Population
392K
County Seat
Trenton
Libraries
14
Schools
94
SearchSystems Editorial
Edited by Sam Rokni — Editor & Owner, SearchSystems.net. Public records professional since 1999. NAPBS founding member. Full bio & credentials.
Last reviewed: June 04, 2026 · Methodology: all Mercer County record-source URLs verified against the official local and New Jersey state publishers on the review date. 4 primary .gov / official sources cited below.
Mercer County — Key Numbers (2026)
Population, demographics, and county-seat data for Mercer County, New Jersey — verified against U.S. Census 2024 estimates.
392,138
Population
Census estimate
139,549
Households
Census estimate
$92,697
Median income
Annual household
$327,600
Median home value
Census ACS
Trenton
County seat
In New Jersey
Criminal records
1 source
Court records
2 sources
Wants & warrants
see state portal
Property records
4 sources
Vital records
see state portal
Voter records
see state portal
Professional licenses
see state portal
Recorded documents
see state portal
Count of verified official sources per record type. Multiple sources One source Use state portal
Mercer County Records at a Glance
| Record type | Mercer County verified sources |
|---|---|
| Court records | Mercer | NJ Courts Bergen County, NJ - Foreclosure Sales Listing (last updated |
| Criminal records | Sheriff Sales |
| Wants & warrants | No verified source — see Mercer County state portal below |
| Property records | Search Assessment and Tax Records | Mercer County, NJ Property Alert Service |
| Vital records | No verified source — see Mercer County state portal below |
| Voter records | No verified source — see Mercer County state portal below |
| Professional licenses | No verified source — see Mercer County state portal below |
| Recorded documents | No verified source — see Mercer County state portal below |
Count of officially verified .gov / .us record sources cataloged for Mercer County. Data verified June 04, 2026.
What Changed in 2026 — Mercer County Records
2026
Mercer County official government portal active
The official Mercer County government website at www.nj.gov continues to serve as the canonical local source.
2026
Mercer County court records portal verified
State court system links for Mercer County verified against the New Jersey judiciary portal in 2026.
2026
Mercer County criminal records access
State criminal records repository for Mercer County (statewide system, not county-specific) confirmed active in 2026.
2026
Mercer County property records online
Mercer County property assessment and recorder office online portal active in 2026.
The 4-Step Mercer County Records Pathway
1
Step 1 — Start at the Mercer County clerk/courthouse
For most local records (court cases, property deeds, marriage licenses), the Mercer County clerk's office is the first stop.
2
Step 2 — Use the New Jersey statewide systems
Criminal background, court case search, voter registration, and professional licensing are all run at the New Jersey state level — not by the county.
3
Step 3 — Federal sources for federal records
Federal court cases (PACER), federal tax liens (IRS), military records (NPRC), and immigration data (ICE) are all federal — not held by the county.
4
Step 4 — Cross-check before relying on data
Most county portals lag 24-48 hours behind the courthouse. For time-sensitive verification, call the clerk directly.
Five Things People Get Wrong About Mercer County Records
❌ Myth: "Mercer County maintains all criminal records."
✓ Truth: False. Criminal records for Mercer County are held by the New Jersey state repository, NOT the county. The county sheriff has only the local arrest log.
❌ Myth: "Records sealed in Mercer County are gone everywhere."
✓ Truth: False. Sealing removes records from public search but they still exist at the courthouse and may appear in FBI records (Identity History Summary).
❌ Myth: "Free 'instant background' sites have Mercer County data."
✓ Truth: False. Only the official New Jersey state repository has verified, current Mercer County data. Free sites often have stale data.
❌ Myth: "The Mercer County assessor's value is what I'll sell my home for."
✓ Truth: False. The Mercer County assessor's value is for property tax purposes only — usually below market value.
❌ Myth: "All county records older than 50 years are public."
✓ Truth: Partially false. Public-records rules vary by record type AND state. Court records and deeds are usually older-public; vital records remain restricted longer (often 75-125 years).
Primary Sources (All Verified)
- www.nj.gov — Official Mercer County government website
- www.njcourts.gov — Court records — official source
- www.princetonnj.gov — Property records — official source
- fbi.gov — FBI Identity History Summary (federal record)
Related — Mercer County & New Jersey Records
For records not specific to Mercer County, use New Jersey's statewide system or the national hub.
📍 New Jersey statewide record systems:
- New Jersey Court Records →
- New Jersey Criminal Records →
- New Jersey Property Records →
- New Jersey Vital Records →
- New Jersey Voter Records →
- New Jersey Wants & Warrants →
- New Jersey Licenses →
- New Jersey Recorded Documents →
🇺🇸 National hubs:
Related Public Records
New Jersey statewide records: Court records · Criminal records · Wants & warrants · Property records · Vital records · Voter records · Licenses · Recorded docs
National directories: Court records · Criminal records · Property records · Vital records · Federal databases
About Mercer County, New Jersey
Mercer County is located in west-central New Jersey. The county seat is Trenton (official site: http://nj.gov/counties/mercer/).
- Households: 139,549
- Median household income: $92,697
- Median home value: $327,600
- Below poverty line: 11.2%
- Land area: 224.5 sq mi
- Population density: 1,746.9 people / sq mi
Search Assessment and Tax Records | Mercer County, NJ
Official Free
Mercer Property Information Portal · New Jersey Courts · Rutgers Cooperative Extension of Mercer County · State of New Jersey · Cure Insurance Arena · Trenton Thunder · Wildlife Center Friends · Pre-Register for the TTN Terminal Area Draft Environmental Assessment Public Hearing ·
Property Alert Service
Official Free
By registering, you are now able to track your property and you will receive e-mail alerts immediately if a document with your name or property description is recorded in the Mercer County Clerk's Office. Unfortunately, property and mortgage fraud is a fast growing crime in the United States. Unscrupulous individuals record fraudulent documents like fake deeds or liens against property owners.
Property Information Portal | Mercer County, NJ
Official Free
Members of the public may still visit the offices of the County Clerk or register to access the County Clerk's Official Records Search page . For basic tax parcel information, the NJ Office of GIS hosts a parcel map with all owners' names redacted. More information about Daniel's Law is available ...
Office of the Tax Assessor | Princeton, NJ
Official Free
Mercer County Sheriff's Office Property Records https://www.mercercounty.org/government/sheriff-/informational/sheriff-s-foreclosure-sale View Mercer County Sheriff's Office foreclosure sales information including dates, file number, court case number and more.
WIPP
Official Free
Your web browser must have JavaScript enabled in order for this application to display correctly
Mercer | NJ Courts
Official Free
Mercer County Civil Courthouse · 175 South Broad Street · Trenton , New Jersey 08650-0068 · 609-571-4200 · Mercer County Criminal Courthouse · 400 South Warren Street · Trenton , New Jersey 08650-0068 · 609-571-4200 · Learn about Jury Service · View more information about the process ...
Bergen County, NJ - Foreclosure Sales Listing (last updated
Official Free
Sales Web - Foreclosure Sales Listing · Please click the link below to search that county's foreclosure listings · Allen County, OH · Ascension Parish, LA · Atlantic County, NJ · Bergen County, NJ · Burlington County, NJ · Camden County, NJ · Canyon County, ID · Cape May County, NJ
Sheriff Sales
Official Free
The requested URL was rejected. Please consult with your administrator. Your support ID is: 4487277321942210747 [Go Back]
2020 News Release | New Jersey State Police
Official Free
Both defendants were lodged at the Mercer County Correction Center and were ordered detained pending trial at detention hearings held last week. “Stopping the flow of illegal guns into New Jersey is a top priority for all of us in New Jersey law enforcement,” said Attorney General Gurbir S. Grewal. “Because four out of five crime guns recovered in New Jersey originate from states ...
🌐 njsp.org
New Jersey State Police - 2015 News Releases
Official Free
The following were arrested at various locations throughout Irvington, Essex County: Tyree Blount, 30, East Orange Antonio Bowser, 39, Irvington Kaprina Cleveland, 29, East Orange Elke Dunbar, 45, East Orange Charles Goode, 53, East Orange Khariah Jones, 26, Newark Tommy Mathis, 55, Lyons Lyndell (Leak) McNeil (Alshabir), 35, Newark Victoria Mercer, 28, Irvington Lamont Parker, 26, Irvington Iris Perez, 42, Irvington Anthony Townsend, 31, Irvington Shakeyah Wingate, 21, Irvington Qasim Woods, 33, Millville
🌐 njsp.org
NJ Department of Health
Official Free
The Department of Health oversees all aspects of public health services. It is responsible for oversight of health care institutions, hospital financing, public health and environmental laboratory services, senior services, health care policy and research, minority and multi-cultural health ...
🌐 nj.gov
Polling Place Search: NJ DOS - Division of Elections
Official Free
The State of NJ site may contain optional links, information, services and/or content from other websites operated by third parties that are provided as a convenience, such as Google™ Translate. Google™ Translate is an online service for which the user pays nothing to obtain a purported ...
Verify New Jersey license - Verification
Official Free
NOTE: Some licenses are issued in the name of the business, not an individual. If you are searching for a business licensee (i.e., accountancy firms; architects and engineers certificates of authorization; barber shops; cemeteries; cosmetology and hairstyling shops; electrical contractor ...
Frequently Asked Questions
How do I look up court cases in Mercer County?
Mercer County court cases are searchable through the Mercer | NJ Courts portal: https://www.njcourts.gov/courts/vicinages/mercer. New Jersey also operates a state-level case lookup through the NJ Courts Online system. For federal matters, see PACER.
How long does an arrest stay on my record in New Jersey if I wasn't convicted?
In New Jersey, an arrest stays on your record indefinitely unless you petition the court to seal or expunge it, even if charges were dropped or you were found not guilty. New Jersey's rules for clearing non-conviction records are stricter than for convictions — start with the New Jersey State Police.
What's the difference between sealing and expunging a record in New Jersey?
In New Jersey, a sealed record is hidden from public view but still exists and remains visible to law enforcement, licensing boards, and some employers. An expunged record is treated by New Jersey law as if it never happened — though FBI and federal records may persist regardless of state action. The relief process runs through the sentencing court.
How do I find someone in ICE custody?
Use the ICE Online Detainee Locator System (locator.ice.gov). You can search by A-number (alien registration number) or by biographical information (name, country of birth, date of birth). The system covers adult detainees currently in ICE custody.