Union County has an estimated 570,000 residents (U.S. Census Bureau, 2023 ACS) in northeastern New Jersey, with Elizabeth as the county seat. Union County is bordered by Essex County and Hudson County to the north, Middlesex County to the south, Somerset County to the west, and Staten Island (Richmond County, NY) to the northeast across the Arthur Kill waterway. This positioning makes Union County part of the northern NJ metro corridor where residents' records may span multiple adjacent counties.
Union County's internal economic contrast is pronounced. Elizabeth is one of New Jersey's most densely populated urban cities with a large Central American immigrant community. Westfield, Summit, New Providence, and Cranford are among New Jersey's most desirable suburban communities with very different demographics and records patterns. The two environments require different research approaches within the same county. New Jersey eCourts at njcourts.gov covers Union County Superior Court statewide. For the broader New Jersey context, see our New Jersey state guide.
Key takeaways
- Union County has an estimated 570,000 residents (U.S. Census Bureau, 2023 ACS). Elizabeth is the county seat and NJ's fourth-largest city — the county also includes affluent western suburbs.
- NJ eCourts at njcourts.gov covers Union County Superior Court in the statewide system — the same query covers adjacent Essex, Middlesex, and Somerset county records automatically.
- Elizabeth has a large Central American community — Salvadoran, Guatemalan, and Honduran naming conventions include patronymic two-surname forms that require broader variant awareness than single-surname searches provide.
- New Jersey's 2017 bail reform means many Union County arrestees appear in eCourts with pending matters but were released pre-trial without extended county jail stays. eCourts pending case records are the primary criminal justice contact indicator.
Union County quick facts
- Population estimate (2023): approximately 570,000 (U.S. Census Bureau, 2023 ACS)
- County seat: Elizabeth
- Largest city: Elizabeth (est. pop. 137,000)
- State: New Jersey
- Primary court: Union County Superior Court; individual municipal courts per municipality
Population estimates from the U.S. Census Bureau.
How to search Union County records
Run NJ eCourts statewide — adjacent county records are in the same query
New Jersey eCourts at njcourts.gov provides free statewide name searches covering all 21 New Jersey counties simultaneously. For Union County searches specifically, the statewide approach is more efficient than county-filtering because many Union County residents have prior address histories in Essex County (Newark, Irvington), Middlesex County (Edison, Woodbridge), or Hudson County (Jersey City). Running statewide surfaces those prior-county records in the same result set without requiring separate portal visits. For disorderly persons offenses — New Jersey's misdemeanor equivalent — each Union County municipality maintains its own municipal court not included in eCourts. Identify the specific municipality and contact that municipal court directly or submit an OPRA request. Our court record search guide covers New Jersey's Superior Court and municipal court structure.
Apply Central American naming variant awareness for Elizabeth searches
Elizabeth has one of the highest concentrations of Salvadoran, Guatemalan, and Honduran residents of any New Jersey city. Central American naming conventions use Spanish patronymic structures — the same individual may appear under a single paternal surname in everyday contexts and under both paternal and maternal surnames in official record systems. Common Central American surnames (Garcia, Martinez, Hernandez, Lopez, Ramirez, Gutierrez, Gonzalez, Torres, Flores, Mejia) are each extremely common within the Elizabeth community. A name-only portal search for any of these surnames returns an unworkable result set without additional anchors. Adding an approximate birth year and a known relative name from the aggregator before the portal, and running both the single-surname and two-surname compound forms, are the standard steps before any Elizabeth common-surname eCourts search. Our find someone by first and last name guide covers systematic name variant strategies for Spanish-surname communities.
Calibrate search approach to the specific municipality before portal work
Union County's internal contrast makes municipality identification the most important preliminary step before interpreting portal results. Elizabeth and Plainfield generate substantial criminal court filing volume — dense eCourts results in these cities are expected and should be filtered by date of birth and name variants. Westfield, Summit, Cranford, and New Providence have much lower criminal court filing rates — thin eCourts results for these communities are more likely accurate than indicative of a search gap. Knowing which community applies before starting prevents misapplying the interpretation standards from one environment to the other. The aggregator address chain establishes the municipality in one query. Our find someone by name and city guide covers how to use municipality context to calibrate portal result interpretation.
Official record sources in Union County
| Record type | Agency | Online access | Notes |
|---|---|---|---|
| Indictable crimes, major civil, family, probate | Union County Superior Court | NJ eCourts — njcourts.gov | Free statewide name search covering all 21 NJ counties including Union Superior Court. Same query covers adjacent Essex, Middlesex, and Somerset county records. Does NOT cover municipal court disorderly persons records. |
| Disorderly persons offenses, ordinance violations | Individual Union County municipal courts (Elizabeth Municipal Court, Plainfield Municipal Court, etc.) | Varies — contact individual court clerk or submit OPRA request | Each Union County municipality maintains its own municipal court. Not included in NJ eCourts. Elizabeth Municipal Court handles the highest volume given Elizabeth's population size. |
| Arrest and booking records | Union County Sheriff / individual municipal police departments | ucnj.org/sheriff | Sheriff covers county jail. NJ 2017 bail reform: many arrestees released pre-trial without extended county jail stays. eCourts pending cases are the primary criminal justice contact indicator. |
| Property records | Union County Clerk | ucnj.org/county-clerk | Recorded documents including deeds, mortgages, and liens. NJ property assessment data also through NJ Division of Taxation portal. |
| Marriage and vital records | Individual municipal clerks / NJ DOH | nj.gov/health/vital | Marriage licenses in NJ are issued by the municipal clerk in the municipality where the ceremony occurs. NJ DOH maintains statewide vital records index. Union County Clerk holds some recorded vital documents. |
| Statewide criminal history | NJ State Police SLED / NJ Division of State Police | Requestor portal — njsp.org | New Jersey State Police provides statewide criminal history name checks. Supplement to eCourts for comprehensive NJ criminal context, particularly for subjects with multi-county NJ history. |
For a broader overview of how public records are aggregated across jurisdictions, see our public record search guide.
Marriage records in Union County
Marriage licenses in New Jersey are issued by the municipal clerk in the municipality where the ceremony takes place — not by the county clerk. Union County's municipal clerks each issue and hold their own marriage records. The New Jersey Department of Health maintains a statewide vital records index at nj.gov/health/vital — certified copies of marriage certificates require proper qualification and a fee, ordered through the municipality where the marriage occurred or through NJ DOH.
Elizabeth's Central American community creates the same patronymic name variant considerations for marriage record searches as for court searches. For a full guide to how marriage record searches work across all states, see our marriage record search guide.
Divorce records in Union County
Divorce cases in New Jersey are filed in Superior Court Family Part in the county of residence. Union County Superior Court Family Part handles dissolution of marriage filings for Union County residents, with case indexes searchable through NJ eCourts at njcourts.gov. New Jersey requires at least one year of state residency before filing for divorce. Case indexes are free to search through eCourts; full documents require contact with the Union County Superior Court Family Part Clerk in Elizabeth.
Union County's western suburban communities (Westfield, Summit, New Providence) generate above-average domestic relations filing volume per capita given the professional demographic. For a full guide to how divorce record searches work across all states, see our divorce record search guide.
Industry insight
The Elizabeth naming issue is the most consistent practical challenge I encounter in Union County. The Central American community there — primarily Salvadoran, Guatemalan, and Honduran — is large enough that common surnames each have dozens of Elizabeth residents. The same person frequently appears under different name forms in different systems: a single paternal surname in the aggregator, a full two-surname compound in the court filing. Running only the single-surname form and concluding no record exists misses cases that are actually there. I add a birth year and run both forms before treating any Elizabeth common-surname result as complete.
The intra-county contrast also produces a consistent misinterpretation problem in the other direction. A clean eCourts result for a Westfield or Summit address is almost certainly accurate — these communities have very low criminal court activity. Rechecking a clean result from these communities because the volume seems low misses the point: low volume is the expected result for high-income NJ suburbs with minimal criminal court activity. Calibrating to the municipality before interpreting the result saves that unnecessary recheck time.
Common mistakes when searching in Union County
- Running bare common Spanish surnames in Elizabeth without date of birth and two-surname variant preparation. Central American surnames (Garcia, Martinez, Hernandez, Lopez, Ramirez) each have many Elizabeth residents. A name-only eCourts search returns an unworkable result volume. Add a birth year and run both the single-surname and compound two-surname forms before reviewing results.
- Expecting eCourts to cover municipal court disorderly persons records. NJ eCourts covers Union County Superior Court only. Elizabeth Municipal Court, Plainfield Municipal Court, and all other Union County municipal courts are in separate systems. Contact the specific municipal court or submit an OPRA request for disorderly persons history.
- Applying the Elizabeth result-volume expectations to Westfield or Summit searches. Low criminal eCourts volume for western Union County suburbs is accurate, not a search gap. These communities have genuinely low crime rates. Rechecking thin results for high-income NJ suburbs wastes time.
- Filtering to Union County in eCourts rather than running statewide. Many Union County residents have prior Essex or Middlesex County addresses with records in those systems. Running statewide captures all 21 counties in the same query with no additional steps — filtering to Union County alone misses the adjacent county records.
Union County court system overview
Union County Superior Court is located in Elizabeth and handles all indictable criminal offenses, major civil matters, family court, and probate. Each Union County municipality operates its own municipal court for disorderly persons offenses and local ordinance violations. Elizabeth Municipal Court handles by far the highest local volume given Elizabeth's population and density. For a broader explanation of New Jersey's court structure, see our court record search guide.
Crime statistics and public-safety context
Union County's crime profile varies sharply between its urban and suburban communities. Elizabeth and Plainfield report above-average violent crime rates for New Jersey. The county's western suburbs — Westfield, Summit, Cranford, New Providence — report very low rates consistent with affluent NJ suburban demographics. Roselle, Roselle Park, and Linden fall at moderate rates between the urban and suburban extremes. New Jersey State Police crime statistics for 2023 showed Union County's aggregate crime rate near the statewide average, with Elizabeth and Plainfield driving most of the county's criminal court volume. Source: New Jersey State Police, Crime in New Jersey 2023.
Major municipalities in Union County
Elizabeth
Elizabeth (est. pop. 137,000 — U.S. Census Bureau, 2023 ACS) is the county seat and New Jersey's fourth-largest city, immediately adjacent to Newark Liberty International Airport. Elizabeth has one of the largest Central American populations — primarily Salvadoran, Guatemalan, and Honduran — of any New Jersey city. The city is also home to a large Puerto Rican community, a significant Caribbean population, and a smaller but established South Asian community in specific neighborhoods. Elizabeth generates Union County's highest criminal and civil court filing volume.
Plainfield
Plainfield (est. pop. 53,000 — U.S. Census Bureau, 2023 ACS) is Union County's second-largest city with a majority African American and growing Latino population. Plainfield's western border approaches Middlesex County — Plainfield addresses near that boundary should be county-confirmed before routing document requests. Plainfield has above-average criminal court filing rates relative to the county average.
Westfield
Westfield (est. pop. 32,000 — U.S. Census Bureau, 2023 ACS) is one of Union County's most desirable and affluent suburban communities with direct NJ Transit rail access to Manhattan. Westfield has very low criminal court filing rates — the vast majority of any Westfield eCourts result set reflects civil and family matters. Address histories in Westfield are stable and reliable for homeowners.
Summit
Summit (est. pop. 22,000 — U.S. Census Bureau, 2023 ACS) is another affluent Union County suburb with direct NYC rail access. Summit has one of the highest median household incomes in New Jersey and very low criminal court activity. Like Westfield, civil and domestic relations records are proportionally far more significant than criminal records for Summit searches.
Linden
Linden (est. pop. 43,000 — U.S. Census Bureau, 2023 ACS) is an industrial and working-class city in the northeastern county near the Staten Island border. Linden has moderate crime rates and above-average court filing volumes relative to the western suburbs. Its position near the Staten Island border creates occasional cross-state proximity with Richmond County (Staten Island) NY — the Arthur Kill waterway is the county boundary.
Common search scenarios
Searching for an Elizabeth subject
Pull date of birth and a relative name from the aggregator. Run NJ eCourts statewide. For common Central American or Puerto Rican surnames, run both the single-surname and two-surname compound forms. Identify the specific municipality and contact Elizabeth Municipal Court or submit an OPRA request for disorderly persons history. See our guide on finding someone by name and city.
Searching for a Westfield or Summit subject
Run NJ eCourts statewide — expect thin criminal results that are likely accurate. Civil and family court records are the more productive search target for western Union County suburb subjects. For any NYC commuter profile suggesting prior Manhattan or outer borough residence, run OCA for the most likely prior borough alongside eCourts. See our court record search guide.
Searching for a subject with Essex or Middlesex County prior history
NJ eCourts covers all 21 NJ counties in the same statewide query — prior Newark, Irvington, Edison, or Woodbridge records surface automatically alongside Union County records without any additional steps. A relative and associate search from the aggregator typically surfaces the prior-county address chain before any portal work begins.
Start Here: Enter Any Name To View Records
Best sites to review first
Before running Union County court portals, these are the two services I recommend reviewing first — Elizabeth name anchoring and municipality identification are the most important preliminary steps.
| Service | Why people use it | Best fit |
|---|---|---|
| Instant Checkmate | Aggregates address history across Union County's municipalities — confirms the specific city and provides the date of birth and relative name anchors needed before Elizabeth common-surname searches in eCourts | Municipality identification and Elizabeth Central American community name anchoring |
| TruthFinder | Address timeline and relative associations across the northern NJ corridor — Union, Essex, Middlesex, and Somerset counties — for subjects who have moved within the metro | Multi-county northern NJ address chain for subjects with prior Essex or Middlesex County history |
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
Does NJ eCourts cover Elizabeth Municipal Court records?
No. NJ eCourts at njcourts.gov covers Union County Superior Court — indictable crimes, major civil matters, family court, and probate. Elizabeth Municipal Court handles disorderly persons offenses, petty disorderly persons, and local ordinance violations. Municipal court records are in a completely separate system. For Elizabeth Municipal Court records, contact the court clerk directly or submit an OPRA request. The New Jersey Government Records Council at state.nj.us/grc provides OPRA guidance.
How do I access Union County Superior Court records online?
New Jersey eCourts at njcourts.gov provides free statewide name searches covering Union County Superior Court alongside all 21 New Jersey counties. No county pre-selection is needed — the same query surfaces Union County records alongside any adjacent Essex, Middlesex, or Somerset County records from prior addresses.
Where do I find marriage and divorce records for Union County?
Marriage licenses in New Jersey are issued by the municipal clerk in the municipality where the ceremony occurs. Contact the specific city's clerk directly — Elizabeth Clerk handles Elizabeth marriages, Westfield Clerk handles Westfield marriages. NJ DOH maintains a statewide vital records index at nj.gov/health/vital. Divorce records are in Union County Superior Court Family Part, searchable through NJ eCourts. Full documents require contact with the Union County Superior Court Family Part Clerk in Elizabeth.
What effect did New Jersey's 2017 bail reform have on Union County records?
New Jersey's 2017 Criminal Justice Reform eliminated cash bail for most defendants. Many Union County arrestees who would previously have been held in county jail are now released pre-trial on monitoring. County jail booking records are consequently less useful as criminal justice contact proxies. eCourts pending case records are now the primary indicator of arrest and lower-level criminal matter activity in Union County.
Why should I run NJ eCourts statewide rather than filtering to Union County?
Many Union County residents have prior address histories in Essex County, Middlesex County, or Hudson County. NJ eCourts covers all 21 New Jersey counties in a single statewide name search — filtering to Union County alone misses prior-county records that are visible in the same query at no additional effort. Running statewide first, then identifying Union County results within the result set if needed, is consistently more complete than county-filtered searches.
How do I find property records for Union County?
The Union County Clerk at ucnj.org/county-clerk handles recorded documents including deeds, mortgages, and liens. New Jersey's statewide property assessment data is also accessible through the NJ Division of Taxation property records portal. For current ownership verification, the local municipal tax assessor maintains property records that may be more current than county clerk recorded documents.
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 New Jersey county guides
- Bergen County (Hackensack)
- Essex County (Newark)
- Middlesex County (New Brunswick)
- Hudson County (Jersey City)
- Camden County
- Monmouth County
Browse all county guides: People Search by County
