Washtenaw County contains Ann Arbor and is home to the University of Michigan — one of the largest research universities in the United States with approximately 48,000 enrolled students. With approximately 375,000 residents (U.S. Census Bureau, 2023 ACS), Washtenaw County is the 22nd Judicial Circuit's home and one of Michigan's most economically prosperous counties. Ann Arbor's combination of a world-class research university, Michigan Medicine (the UM health system), and a growing technology and life sciences sector creates a highly educated and relatively transient professional population distinctly different in character from neighboring Wayne, Oakland, and Macomb counties.
The defining practical consideration for Washtenaw County searches is that the University of Michigan creates a substantial address-churn problem. The student population cycles through Ann Arbor ZIP codes every four years, leaving behind database records of dormitory addresses, off-campus student housing, and campus-adjacent apartments that persist in aggregator systems for years after the student has moved elsewhere. Michigan has no statewide court portal covering all levels simultaneously. ICHAT is the most efficient starting point for Washtenaw County criminal history. For the broader Michigan context, see our Michigan state guide.
Key takeaways
- Washtenaw County has approximately 375,000 residents (U.S. Census Bureau, 2023 ACS). Ann Arbor is the county seat and largest city, home to the University of Michigan and Michigan Medicine.
- UM's approximately 48,000 enrolled students create significant address churn in campus-adjacent Ann Arbor ZIP codes. Student-era addresses may appear as current in aggregator databases for graduates two or more years out.
- Ann Arbor's 15th District Court handles city misdemeanors separately from Washtenaw County Circuit Court and separately from Ypsilanti's district court.
- Ypsilanti hosts Eastern Michigan University (approximately 15,000 enrolled) — a second, lower-intensity university address-churn factor in eastern Washtenaw County.
Washtenaw County quick facts
- Population estimate (2023): approximately 375,000 (U.S. Census Bureau, 2023 ACS)
- County seat: Ann Arbor
- Largest city: Ann Arbor (est. pop. 123,000)
- State: Michigan
- Primary courts: Washtenaw County Circuit Court (22nd Judicial Circuit); 15th District Court (Ann Arbor); 14A District Court (Ypsilanti and adjacent communities)
Population estimates from the U.S. Census Bureau.
How to search Washtenaw County records
Verify address currency for any Ann Arbor address in campus ZIP codes
The most important preliminary step for many Washtenaw County searches is confirming whether an Ann Arbor address is a current residence or a historical student-era address. The University of Michigan's campus and the surrounding neighborhoods — ZIP codes 48109 (university itself), 48104 (central student housing areas), and 48105 (Burns Park and north campus area) — generate the highest concentration of stale database addresses. For any subject who attended UM or whose career history suggests a possible UM connection, addresses in these ZIP codes should be verified for currency before being used as a current anchor. The verification approach is: check the Washtenaw County Register of Deeds to see if the subject is the current property owner (homeownership confirms current residency) or check the aggregator's employment history to see if current employment in Ann Arbor is consistent with the address. The 15th District Court may also have current-era filings that confirm ongoing Ann Arbor residence. Our find someone by first and last name guide covers how to use employment context and relative associations to distinguish current from historical addresses.
Start with ICHAT for Michigan-wide criminal context
Michigan has no statewide court portal covering all court levels simultaneously. ICHAT at michigan.gov/ichat is a fee-based statewide name search covering all 83 Michigan counties including Washtenaw. Running ICHAT before individual Washtenaw County court portals provides two benefits: it confirms whether the subject has Michigan criminal history at all, and it surfaces any records in other Michigan counties for subjects with prior Detroit metro or other Michigan addresses. UM graduates who relocated to Detroit, Grand Rapids, or other Michigan metros after graduation often have their most substantive criminal records in those destination counties rather than in Washtenaw. OTIS at mdocweb.state.mi.us supplements ICHAT for current state corrections supervision with free photo identification. Our criminal record search guide covers how ICHAT fits into the Michigan statewide search workflow.
Check the correct district court for Ann Arbor vs. Ypsilanti vs. other cities
Ann Arbor is served by the 15th District Court for misdemeanors and traffic. Ypsilanti is served by the 14A District Court. Saline and other Washtenaw County communities are served by the 14B District Court. None of these systems shares records with the others. For a subject who may have lived in both Ann Arbor and Ypsilanti at different times — common for the university-connected population given Eastern Michigan University's Ypsilanti location — running both the 15th and 14A District Courts alongside Washtenaw County Circuit Court provides complete county coverage. Identifying which district court applies by confirming the subject's specific city takes one aggregator query and prevents running the wrong misdemeanor portal. Our find someone by name and city guide covers how to confirm the specific municipality before portal selection.
Official record sources in Washtenaw County
| Record type | Agency | Online access | Notes |
|---|---|---|---|
| Felony criminal, major civil, domestic relations, probate | Washtenaw County Circuit Court (22nd Judicial Circuit) | MiCourt — courts.michigan.gov | Free name-based case index search. Covers all Washtenaw County felony, civil, family, and probate matters. Does NOT cover any district court misdemeanor records. |
| Misdemeanor criminal, traffic (Ann Arbor city limits) | 15th District Court | courts.michigan.gov/courts/15th-district | Covers Ann Arbor city limits only. Separate from Washtenaw County Circuit Court and from the 14A and 14B District Courts. |
| Misdemeanor criminal, traffic (Ypsilanti and adjacent communities) | 14A District Court | courts.michigan.gov/courts/14a-district | Covers Ypsilanti and several adjacent communities. Separate from the 15th District and 14B District Courts. |
| Misdemeanor criminal, traffic (Saline and other communities) | 14B District Court | courts.michigan.gov/courts/14b-district | Covers Saline and remaining Washtenaw County communities not served by the 15th or 14A. Separate from Ann Arbor and Ypsilanti courts. |
| Statewide criminal history (all 83 Michigan counties) | Michigan ICHAT | michigan.gov/ichat | Fee-based ($10) statewide name search. Most efficient starting point for any Michigan criminal history check. Covers Washtenaw without pre-selection and surfaces prior Michigan county records for UM graduates who relocated. |
| State corrections supervision | Michigan OTIS | mdocweb.state.mi.us/OTIS2/otis2.aspx | Free. Current MDOC supervision and facility placement. Includes photos for identity confirmation. 3-year purge rule applies. |
| Property records | Washtenaw County Register of Deeds | washtenaw.org/county-government/departments-h-z/register-of-deeds | Free online search by owner name or address. Well-maintained portal. Most reliable current-address verification tool — homeownership confirms current residency, particularly useful for distinguishing current Ann Arbor residents from former students. |
| Marriage and vital records | Washtenaw County Clerk / Michigan DHHS | washtenaw.org/county-government/departments-h-z/county-clerk and michigan.gov/mdhhs/vital-records | Washtenaw County Clerk issues marriage licenses. Michigan DHHS maintains statewide vital records index from 1867 forward. Certified copies require fee and qualification. |
For a broader overview of how public records are aggregated across jurisdictions, see our public record search guide.
Marriage records in Washtenaw County
Marriage licenses in Michigan are issued by the county clerk in the county where the license is obtained. The Washtenaw County Clerk issues marriage licenses and maintains a local index. Michigan Department of Health and Human Services maintains a statewide vital records index from 1867 forward at michigan.gov/mdhhs/vital-records — certified copies require fee payment and proper qualification.
Ann Arbor's international university community creates diverse naming conventions for marriage record searches. UM attracts faculty, researchers, and students from countries with non-Latin naming systems — Indian, Chinese, Korean, and Arabic name transliteration variant awareness may be relevant depending on the specific subject. For a full guide to how marriage record searches work across all states, see our marriage record search guide.
Divorce records in Washtenaw County
Divorce cases in Michigan are filed in Circuit Court in the county of residence. Washtenaw County Circuit Court handles dissolution of marriage filings for Washtenaw County residents, with case indexes accessible through MiCourt at courts.michigan.gov. Michigan requires 180 days of state residency before filing. Full documents require contact with the Washtenaw County Circuit Court Clerk.
Washtenaw County's divorce filing volume is elevated relative to its population given the professional and academic demographic and its high median household income. For subjects who relocated to Ann Arbor from other Michigan counties, prior divorce filings stay in the county where the case was originally filed. For a full guide to how divorce record searches work across all states, see our divorce record search guide.
Industry insight
Washtenaw County has two distinct search environments that require different approaches. Ann Arbor proper — particularly the campus ZIP codes — is one of the most unreliable address data environments in Michigan because of the UM student cycle. Former students who graduated two, three, or five years ago still show campus-area addresses in databases. Before I treat any Ann Arbor address as a current anchor for someone in their 20s or 30s who could be a UM graduate, I check the Washtenaw Register of Deeds for property ownership. If they own a home at that address, it is current. If not, I treat it as potentially historical and look for employment context to anchor the current city.
The rest of Washtenaw County — Saline, Dexter, and the township communities — has a completely different character. These are stable suburban and rural communities with reliable long-term address patterns. The address churn problem is essentially limited to Ann Arbor and Ypsilanti. For any Washtenaw County address outside Ann Arbor and Ypsilanti, I treat the aggregator address as significantly more likely to be current than a similar address in the campus ZIP codes.
Common mistakes when searching in Washtenaw County
- Treating a campus-area Ann Arbor address as a current residence for someone who may be a UM graduate. ZIP codes 48109, 48104, and 48105 generate large volumes of stale student-era addresses. Verify currency through property ownership or current employer context before relying on a campus-adjacent Ann Arbor address as a current anchor.
- Searching only the 15th District Court for subjects who may have lived in both Ann Arbor and Ypsilanti. Ann Arbor and Ypsilanti are served by different district courts (15th and 14A respectively). A subject who attended UM then EMU or lived in both cities at different periods may have misdemeanor records in both courts. Identify the city for each address period before selecting the misdemeanor portal.
- Skipping ICHAT when a UM graduate may have relocated to another Michigan county. UM graduates commonly relocate to the Detroit metro, Grand Rapids, or Lansing after graduation. ICHAT covers all 83 Michigan counties and surfaces records in whatever county the subject currently lives, making it the most efficient way to find relocated graduates without running individual county portals.
- Not accounting for the Ypsilanti EMU address churn. Eastern Michigan University enrolls approximately 15,000 students who cycle through Ypsilanti addresses. For any Ypsilanti address in campus-adjacent ZIP codes, apply the same currency verification standard as for Ann Arbor UM addresses.
Washtenaw County court system overview
Washtenaw County Circuit Court (22nd Judicial Circuit) handles felonies, major civil cases, domestic relations, and probate county-wide through MiCourt. The 15th District Court handles misdemeanors and traffic for Ann Arbor city limits. The 14A District Court covers Ypsilanti and adjacent communities. The 14B District Court covers Saline and remaining Washtenaw County areas. ICHAT at michigan.gov/ichat covers all 83 Michigan counties for statewide criminal history. OTIS covers current state corrections supervision. For a broader explanation of Michigan's court structure, see our court record search guide.
Crime statistics and public-safety context
Washtenaw County's crime profile varies sharply between Ann Arbor, Ypsilanti, and the rest of the county. Ann Arbor has elevated property crime rates relative to comparable Michigan cities of its size — a pattern common near large research universities with dense student populations. Ypsilanti has significantly higher violent crime rates than Ann Arbor, reflecting its different economic demographic. The township communities and Saline report very low rates by Michigan standards. Michigan State Police crime statistics for 2023 showed Washtenaw County's aggregate crime rates below the statewide average, reflecting the county's affluent suburban and rural communities. Source: Michigan State Police, Crime in Michigan 2023.
Major cities in Washtenaw County
Ann Arbor
Ann Arbor (est. pop. 123,000 — U.S. Census Bureau, 2023 ACS) is the county seat and home to the University of Michigan main campus and Michigan Medicine. The city's population includes approximately 48,000 enrolled students, a large healthcare and academic professional workforce, and a growing technology sector. The 15th District Court handles city misdemeanor and traffic matters separately from Washtenaw County Circuit Court. Campus-adjacent ZIP codes (48109, 48104, 48105) are the highest-churn address zones in the county.
Ypsilanti
Ypsilanti (est. pop. 21,000 — U.S. Census Bureau, 2023 ACS) is in eastern Washtenaw County and home to Eastern Michigan University with approximately 15,000 enrolled students. Ypsilanti has a significantly different demographic and economic profile from Ann Arbor — lower median income, higher violent crime rates, and a larger working-class and lower-income population. The 14A District Court covers Ypsilanti for misdemeanors. EMU creates additional student address churn in campus-adjacent Ypsilanti ZIP codes distinct from the UM churn in Ann Arbor.
Saline
Saline (est. pop. 9,000 — U.S. Census Bureau, 2023 ACS) is in southern Washtenaw County with a stable, suburban residential character. Saline is served by the 14B District Court. Very low crime rates and long-tenure residential patterns make Saline address records significantly more reliable than campus-zone Ann Arbor addresses as current anchors.
Dexter
Dexter (est. pop. 4,500 — U.S. Census Bureau, 2023 ACS) is in western Washtenaw County. Dexter's small size, low crime rates, and stable homeowner base produce one of the most reliable address data environments in the county. Records here are sparse in volume but reliable when they appear.
Chelsea
Chelsea (est. pop. 5,000 — U.S. Census Bureau, 2023 ACS) is in western Washtenaw County near the Jackson County line. Chelsea's proximity to the county border means some subjects with Chelsea-adjacent addresses may have Jackson County records from prior periods. Chelsea is served by the 14B District Court for local misdemeanor matters.
Common search scenarios
Searching for a current Ann Arbor resident vs. a UM alumnus
Check the Washtenaw Register of Deeds for property ownership at the address — homeownership confirms current residency. If the subject is a renter, look for current Ann Arbor employer in the aggregator's employment history. For someone who graduated UM more than two years ago and whose current employer is outside Ann Arbor, treat the Ann Arbor address as historical and search the current employer's city or state instead. See our guide on finding someone by name and city.
Checking Washtenaw County court records
ICHAT for statewide criminal context. MiCourt for Washtenaw County Circuit Court felony and civil matters. 15th District Court for Ann Arbor city misdemeanors. 14A District Court for Ypsilanti misdemeanors. Washtenaw Register of Deeds for property-based address verification. See our court record search guide.
Searching for a UM graduate who may have relocated
Run ICHAT for the complete Michigan statewide picture — it covers all 83 counties including the likely destination counties (Wayne, Oakland, Kent, Ingham). If ICHAT returns nothing and the subject may have left Michigan, a nationwide aggregator search is the practical next step before committing to individual county portal work. A relative and associate search typically surfaces the current city quickly.
Start Here: Enter Any Name To View Records
Best sites to review first
Before running Washtenaw County court portals, these are the two services I recommend reviewing first. Address currency verification and prior-state identification are the two most critical steps for Washtenaw County searches.
| Service | Why people use it | Best fit |
|---|---|---|
| Instant Checkmate | Aggregates employment history and address timeline — the most effective tool for distinguishing current Ann Arbor residents from former UM students with historical campus-area addresses | Ann Arbor address currency verification and UM graduate current-location identification |
| TruthFinder | Address timeline spanning Washtenaw County and prior or subsequent Michigan and out-of-state addresses for UM alumni who relocated after graduation | Multi-state address chain for UM and EMU graduates with complex post-graduation residential histories |
Important: These services are not FCRA-compliant consumer reporting agencies. Do not use them for employment screening, tenant decisions, insurance underwriting, or any other purpose regulated by the Fair Credit Reporting Act.
Frequently asked questions
How do I tell if an Ann Arbor address is current or from someone's UM student years?
The most reliable method is checking the Washtenaw County Register of Deeds for property ownership at the address. If the subject owns the property, it is a current residence. For renters, looking at the aggregator's employment history is the next step — current employment in Ann Arbor or Michigan Medicine suggests current residency, while current employment in another city or state suggests a historical address. Campus-adjacent ZIP codes (48109, 48104, 48105) warrant extra scrutiny for anyone who graduated or could have attended UM.
How do I access Washtenaw County court records online?
Washtenaw County Circuit Court records are accessible through MiCourt at courts.michigan.gov for felonies, major civil cases, domestic relations, and probate. For Ann Arbor misdemeanor records, the 15th District Court has its own portal. For Ypsilanti, the 14A District Court. ICHAT at michigan.gov/ichat covers all 83 Michigan counties for statewide criminal history for a $10 fee. OTIS is free for current corrections supervision.
Does the 15th District Court cover Ypsilanti as well as Ann Arbor?
No. The 15th District Court covers Ann Arbor city limits only. Ypsilanti is covered by the 14A District Court — a separate system. A subject who lived in Ann Arbor during UM enrollment and in Ypsilanti during EMU enrollment may have misdemeanor records in both the 15th and 14A District Courts during different periods. Running both courts alongside Washtenaw County Circuit Court provides complete county coverage for subjects with both Ann Arbor and Ypsilanti residence periods.
Where do I find marriage and divorce records for Washtenaw County?
Marriage licenses are issued by the Washtenaw County Clerk. Michigan DHHS maintains a statewide vital records index from 1867 forward at michigan.gov/mdhhs/vital-records — certified copies require fee payment and qualification. Divorce records are in Washtenaw County Circuit Court through MiCourt. Full documents require contact with the Circuit Court Clerk.
How do I find property records for Washtenaw County?
The Washtenaw County Register of Deeds provides free online searches by owner name or address for ownership and recorded documents. The portal is well-maintained and is the most reliable current-address verification tool for Washtenaw County homeowners — particularly useful for the Ann Arbor campus-area address currency verification step described above.
Is Washtenaw County affected by the MDOC 3-year purge rule?
Yes. Michigan Department of Corrections OTIS removes individuals released from state prison more than three years ago from public records. A clean OTIS result does not mean no state prison history. Washtenaw County Circuit Court records through MiCourt provide more complete criminal history coverage for cases that have aged out of OTIS.
Can I use these searches for jobs, housing, or insurance decisions?
No. The services discussed on this page are not consumer reporting agencies and the information here is not a consumer report. They should not be used for employment, tenant screening, insurance underwriting, credit, or any other purpose regulated by the Fair Credit Reporting Act.
Other Michigan county guides
- Wayne County (Detroit)
- Oakland County (Troy/Pontiac)
- Kent County (Grand Rapids)
- Macomb County (Warren/Sterling Heights)
- Genesee County (Flint)
Browse all county guides: People Search by County
