New Mexico Counties Directory & Interactive Map
Complete official guide to all 33 counties in New Mexico (NM). Explore 2024 US Census population estimates, county seats, FIPS codes, land areas, and interactive mapping tools powered by GeoMap Suite.
New Mexico County Breakdown
Showing 6 of 6 documented counties and seats.
County Name | FIPS | County Seat | Population (Census) | Land Area | Quick Tool |
|---|---|---|---|---|---|
| Bernalillo County (Albuquerque) | 35001 | Albuquerque | 676,444 | 1,166 sq mi | Lookup |
| Doña Ana County (Las Cruces) | 35013 | Las Cruces | 219,561 | 3,808 sq mi | Lookup |
| Santa Fe County | 35049 | Santa Fe | 154,823 | 1,909 sq mi | Lookup |
| Sandoval County | 35043 | Bernalillo | 148,834 | 3,710 sq mi | Lookup |
| San Juan County (Farmington) | 35045 | Aztec | 121,661 | 5,514 sq mi | Lookup |
| Valencia County | 35061 | Los Lunas | 76,205 | 1,066 sq mi | Lookup |
Geographic Structure of New Mexico Counties
County Administration & Governance
In New Mexico, county governments manage vital public infrastructure, tax assessments, law enforcement, judicial courts, election administration, and public records. The county seat (Albuquerque and other municipal headquarters) houses the primary courthouse, commissioners, and sheriff’s department.
All New Mexico counties carry a unique 5-digit Federal Information Processing Standard (FIPS) code, where the first two digits (35) designate the state and the remaining three digits identify each specific jurisdiction.
Geographic & Demographic Highlights
- Most Populous County:Bernalillo County (Albuquerque) (676,444 residents)
- Largest by Land Area:San Juan County (Farmington) (5,514 sq mi)
- State Capital:Santa Fe
- Census Bureau Region:West United States
Demographic calculations derive from the United States Census Bureau 2024 Population Estimates Program (PEP) and TIGER/Line geographic boundary files.