Union County sits in northeastern New Jersey between Essex County (Newark) to the north, Middlesex County to the south, and Somerset County to the west. With roughly 570,000 residents, Union County has one of the most economically diverse populations of any New Jersey county — Elizabeth is one of the state's most urban and lower-income cities, while Westfield, Summit, and Mountainside are among the most affluent communities in New Jersey.
NJ eCourts at njcourts.gov covers Union County Superior Court in the statewide case management system. For the broader New Jersey context including OPRA and eCourts structure, see our New Jersey state guide.
Key takeaways
- Union County (pop. est. 570,000 — U.S. Census Bureau, 2023 ACS) contains Elizabeth — NJ's fourth-largest city — alongside some of the state's most affluent suburbs.
- NJ eCourts covers Union County Superior Court statewide — no county pre-selection needed but Union County must be identified as the filing jurisdiction.
- Elizabeth has a large Latin American population — primarily from Central America, the Caribbean, and South America — making Spanish-language surname variant checking essential for Elizabeth searches.
- Union County borders Essex, Middlesex, and Somerset counties — prior-county records are commonly relevant for longtime northern NJ residents who have moved between these adjacent systems.
Union County quick facts
- Population estimate (2023): approximately 570,000 (U.S. Census Bureau, 2023 ACS)
- County seat: Elizabeth
- Largest city: Elizabeth
- State: New Jersey
- Primary court: Union County Superior Court (NJ eCourts statewide)
Population estimates from the U.S. Census Bureau.
How record searches work in Union County
Union County searches use NJ eCourts at njcourts.gov for Superior Court criminal, civil, and family matters. Municipal courts in Elizabeth, Plainfield, Linden, Rahway, and other Union County municipalities handle local ordinance and traffic matters separately. Each municipal court maintains its own records outside the eCourts system.
For subjects with prior addresses in Newark (Essex County) or New Brunswick (Middlesex County), NJ eCourts covers all NJ Superior Courts in the same search. Our guide on finding someone by name and city covers how to use Elizabeth or Westfield as a search anchor.
Types of records available in Union County
- Superior Court records — NJ eCourts statewide, Union County jurisdiction
- Municipal court records — city-specific municipal court portals
- Property records — Union County Clerk online portal
- Vital records — Union County Clerk for marriage licenses; NJ DOH statewide index
- Adjacent county supplements — NJ eCourts covers Essex, Middlesex, and Somerset counties in the same statewide search
Crime statistics and public-safety context
Union County has a bifurcated crime profile. Elizabeth and Plainfield have crime rates significantly above the NJ state average; the affluent western suburbs (Westfield, Summit, Mountainside, New Providence) have rates well below it. The county generates substantial criminal court filings through its urban centers relative to its overall population. Source: New Jersey State Police, Uniform Crime Report 2022.
Major cities in Union County
Elizabeth
Elizabeth (est. 137,298 — U.S. Census Bureau, 2023 ACS) is the county seat and NJ's fourth-largest city, immediately adjacent to Newark Airport. Elizabeth has one of New Jersey's largest Latin American populations — primarily Central American (Salvadoran, Guatemalan, Honduran) alongside Caribbean and South American communities. Spanish-language surname variants, including hyphenated paternal-maternal surname combinations common in Central American naming conventions, are standard in Elizabeth name searches.
Plainfield
Plainfield (est. 53,000 — U.S. Census Bureau, 2023 ACS) is Union County's second-largest city with a majority Black population and significant Latin American community. Plainfield generates above-average criminal and family court filings relative to its population. It borders Middlesex County — Plainfield searches should consider that some addresses near the border may fall in Middlesex rather than Union County.
Westfield, Summit, and the western suburbs
Westfield, Summit, Cranford, and New Providence are Union County's affluent western suburbs with stable, long-tenure residential populations and low court filing rates. Address histories for residents of these communities tend to be multi-year and reliable. These communities route entirely to Union County Superior Court with no cross-county ambiguity.
Common search scenarios
Elizabeth searches
NJ eCourts for Superior Court matters. For Elizabeth subjects, prepare Spanish-language surname variants before treating a negative result as definitive. Elizabeth Municipal Court handles local violations separately. For prior Essex County (Newark) connections, NJ eCourts covers Essex in the same statewide search.
Checking court records
NJ eCourts Superior Court → Union County municipal courts for local violations → Union County Clerk for property and civil records. NJ eCourts covers adjacent Essex, Middlesex, and Somerset counties in the same search. See our court record search guide for national context.
Searching after a move
Union County out-migration most commonly goes to Middlesex County, Somerset County, or Morris County as residents move westward along the NJ corridor. NJ eCourts covers all of these in a single statewide search without additional steps.
Start Here: Enter Any Name To View Records
Best sites to review first
Before navigating Union County's eCourts portal, these are the two services I recommend reviewing first.
| Service | Why people use it | Best fit |
|---|---|---|
| Instant Checkmate | Useful for establishing prior Essex or Middlesex county address history and for flagging the specific municipality in Union County — important for routing to the correct municipal court. | Quick first-pass searches |
| TruthFinder | Useful for broader northern NJ address history spanning Union, Essex, Middlesex, and Somerset counties for subjects who have moved across the northern NJ corridor. | Expanded public-record context |
Frequently asked questions
Does Union County have an online court records search?
Yes, through NJ eCourts at njcourts.gov, which covers all New Jersey Superior Courts including Union County in a single statewide system. Municipal courts for Elizabeth, Plainfield, Linden, Rahway, and other Union County municipalities handle local violations separately and are not covered by eCourts.
Can you look up marriage or divorce records in Union County?
Yes. Marriage licenses in Union County are issued by the Union County Clerk. The New Jersey Department of Health maintains a statewide vital records index — marriage records from 1878 forward are available through the NJ vital records request process. Divorce case indexes are accessible through NJ eCourts. Union County generates significant marriage and divorce filing volume across its broad population spectrum from Elizabeth to the affluent western suburbs.
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
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