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 Union County record-source URLs verified against the official local and New Mexico state publishers on the review date. 6 primary .gov / official sources cited below.
Union County — Key Numbers (2026)
Population, demographics, and county-seat data for Union County, New Mexico — verified against U.S. Census 2024 estimates.
3,926
Population
Census estimate
1,463
Households
Census estimate
$41,714
Median income
Annual household
$126,900
Median home value
Census ACS
Clayton
County seat
In New Mexico
Criminal records
see state portal
Court records
2 sources
Wants & warrants
see state portal
Property records
2 sources
Vital records
1 source
Voter records
2 sources
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
Union County Records at a Glance
| Record type | Union County verified sources |
|---|---|
| Court records | Public Records - New Mexico Courts NM Case Lookup - New Mexico Courts |
| Criminal records | No verified source — see Union County state portal below |
| Wants & warrants | No verified source — see Union County state portal below |
| Property records | Assessors Office - Union County Assessors Office | Union County, NM |
| Vital records | Vital Records - New Mexico: Local History & Genealogy Re… |
| Voter records | Union County, New Mexico Admin: Official Record Search ... Voter Data Information | Maggie Toulouse Oliver - New Mexico… |
| Professional licenses | No verified source — see Union County state portal below |
| Recorded documents | No verified source — see Union County state portal below |
Count of officially verified .gov / .us record sources cataloged for Union County. Data verified June 04, 2026.
What Changed in 2026 — Union County Records
2026
Union County official government portal active
The official Union County government website at www.unionnm.us continues to serve as the canonical local source.
2026
Union County court records portal verified
State court system links for Union County verified against the New Mexico judiciary portal in 2026.
2026
Union County property records online
Union County property assessment and recorder office online portal active in 2026.
2026
FBI Identity History Summary (federal complement)
For records that may exist outside New Mexico, the FBI Identity History Summary at fbi.gov complements all county-level state records.
The 4-Step Union County Records Pathway
1
Step 1 — Start at the Union County clerk/courthouse
For most local records (court cases, property deeds, marriage licenses), the Union County clerk's office is the first stop.
2
Step 2 — Use the New Mexico statewide systems
Criminal background, court case search, voter registration, and professional licensing are all run at the New Mexico 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 Union County Records
❌ Myth: "Union County maintains all criminal records."
✓ Truth: False. Criminal records for Union County are held by the New Mexico state repository, NOT the county. The county sheriff has only the local arrest log.
❌ Myth: "Records sealed in Union 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 Union County data."
✓ Truth: False. Only the official New Mexico state repository has verified, current Union County data. Free sites often have stale data.
❌ Myth: "The Union County assessor's value is what I'll sell my home for."
✓ Truth: False. The Union 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.unionnm.us — Official Union County government website
- nmcourts.gov — Court records — official source
- unionnm.us — Property records — official source
- guides.loc.gov — Vital records — official source
- union.nm.publicsearch.us — Voter records — official source
- fbi.gov — FBI Identity History Summary (federal record)
Related — Union County & New Mexico Records
For records not specific to Union County, use New Mexico's statewide system or the national hub.
📍 New Mexico statewide record systems:
- New Mexico Court Records →
- New Mexico Criminal Records →
- New Mexico Property Records →
- New Mexico Vital Records →
- New Mexico Voter Records →
- New Mexico Wants & Warrants →
- New Mexico Licenses →
- New Mexico Recorded Documents →
🇺🇸 National hubs:
Related Public Records
New Mexico 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 Union County, New Mexico
Union County is located in the northeast corner of New Mexico. The county seat is Clayton (official site: http://www.unionnm.us/).
- Population: 3,926
- Households: 1,463
- Median household income: $41,714
- Median home value: $126,900
- Below poverty line: 17.8%
- Land area: 3,825.1 sq mi
- Population density: 1.0 people / sq mi
- Public libraries indexed: 1
- NCES schools indexed: 7
Public Records - New Mexico Courts
Official Free
See current electronic court records from all New Mexico Courts.
NM Case Lookup - New Mexico Courts
Official Free
Use of this site for any purpose other than viewing individual electronic court records, or attempts to download multiple records per transaction, are strictly prohibited. Data use is subject to NMSA 1978, Sec. 14-3-15.1 · If the information displayed on this site does not accurately reflect ...
New Mexico Department of Public Safety
Official Free
Case Lookup · Exit · ©2007-2010 New Mexico Courts
Union County, New Mexico Admin: Official Record Search ...
Official Free
Your web browser is out of date. Update your browser for more security, speed and the best experience on this site
Voter Data Information | Maggie Toulouse Oliver - New Mexico Secretary of State
Official Free
Information on Voting and Elections in the State of New Mexico · Information on how to become a candidate and about complying with campaign finance disclosure and reporting requirements
My Registration Information
Official Free
Voter Information Portal · New Mexico Office of the Secretary of State · New Mexico Capitol Annex North / 325 Don Gaspar, Suite 300 / Santa Fe, NM 87501 · (505) 827-3600 / (800) 477-3632 / Email SOS Elections · Visit Secretary of State Website · Contact your County Clerk ·
Assessors Office - Union County
Official Free
Hollie.Sandoval@unionnm.us · Physical: 200 Court Street Mailing: PO Box 430 Clayton, NM 88415 Office - 575.374.9441 Ext. 1 Fax - 575.374.2763
Assessors Office | Union County, NM
Official Free
Provides information on Union County’s Assessor’s Office, including property assessments, tax information, and related services for residents and property owners.
Union County, NM | Official Website
Official Free
Create a Website Account - Manage notification subscriptions, save form progress and more · There are no published events in current month
Vital Records - New Mexico: Local History & Genealogy Resource Guide - Research Guides at Library of Congress
Official Free
FamilySearch has digitized many of its microfilms containing county courthouse records including birth, death, and marriage. Not all records have been indexed yet, so search engine results may NOT show you the full range of FamilySearch data. You must browse the FamilySearch catalog External listings for each county to view the full set of records available.
Vital Records - Birth Certificate
Official Free
For further information about these services, please contact the appropriate county clerk or district court. The National Center for Health Statistics provides a Vital Records Reference by State where you can click on the state where the birth, death, marriage or divorce occurred and obtain instructions on how to order a record. Please review the List of Acceptable Documents for Obtaining a Birth Record for details. Register birth and death certificates for the State of New Mexico.
Law Enforcement Records Bureau - NM Department of Public Safety
Official Free
It is the mission of the Law Enforcement Records Bureau (LERB) to maintain complete and accurate records and respond to the needs of the public and law enforcement and criminal justice agencies in an efficient and expeditious manner · We provide support and customer engagement through our ...
Online Services | NM Regulation and Licensing Department
Official Free
For an alcohol liquor license, alcohol delivery permit, tobacco/tobacco products license and expiration date, or Server Permits, search the RLD database by selecting Regulation Type (Alcohol or Tobacco), Entity Type (busines/premises, Alcohol Server or Instructor) and enter the Business Type & Name for Establishments or First Name and Last Name for Server (do not search for old permit number). Click on the link below: The New Mexico Regulation and Licensing Department has implemented an online licensing system called NM-PLUS for 28 professions regulated under the Boards and Commissions…
County Clerk Information | Maggie Toulouse Oliver - New Mexico Secretary of State
Official Free
Clerk: Devian Fields (R) P.O. Box 430 Clayton, NM 88415 Phone: (575) 374-9491 Website: https://unionnm.us/clerks-office-1 Email: devian.fields@unionnm.us Election & Registration Inquiries: devian.fields@unionnm.us · Clerk: Michael Milam (R) P. O. Box 969 (Mailing Address) 444 Luna Avenue (Physical ...
Frequently Asked Questions
How do I look up court cases in Union County?
Union County court cases are searchable through the Public Records - New Mexico Courts portal: https://nmcourts.gov/public-records/. New Mexico also operates a state-level case lookup through the NM Courts Case Lookup system. For federal matters, see PACER.
What's the difference between sealing and expunging a record in New Mexico?
In New Mexico, 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 Mexico 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 long does an arrest stay on my record in New Mexico if I wasn't convicted?
In New Mexico, 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 Mexico's rules for clearing non-conviction records are stricter than for convictions — start with the New Mexico Department of Public Safety.
Are New Mexico criminal records public?
Mostly yes. New Mexico's public-records law makes adult arrests, court filings, and conviction histories accessible to anyone unless a specific statutory exemption applies. Juvenile cases and sealed records are generally excluded by statute.