ZIP Codes of San Juan County, NM

Population & People
Population & People
Total Population
5,571
Household Income
Household Income
Median Income
$63,860
Housing
Housing
Total Housing Units
2,546
Business & Economy
Business & Economy
Total Businesses
2,470
Employment
Employment
Employment Rate
56.08%
Education
Education
Bachelor's Degree+
21.94%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 1 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:17 ZIP Codes (12 Standard, 5 PO Box, 0 Unique) [See All]
Area Codes:505 / 970
Timezone:Mountain (GMT -07:00)
Local Time:2:13:12 PM
Population:5,571 [See All]
FIPS:35045
CBSA:Farmington, NM
Land Area:4,487 sq mi
Water Area:23 sq mi
Coordinates:37.1081, -107.6572
Quick Link:
https://www.zip-codes.com/county/nm-san-juan.asp
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New Mexico's #48 most populous county
5,571 residents across 1 ZIPs — #48 of 65 New Mexico counties.

Standout ZIPs in this County


Most Populous
Farmington · 45,229 people
37.6% of county total
Highest Income
La Plata · $82,750 median
1.7× county average
Largest Land Area
Bloomfield · 742.6 sq mi
Spans the most ground
Fastest Growth
Sheep Springs · 59.2% (10-yr)
1,025 → 1,632 residents
Most Educated
Farmington · 28.4% bachelor's+
2,108 of 7,413 adults 25+

Things worth knowing about San Juan County


120,178 residents live across 17 ZIPs covering 4,487 sq mi, served by 15 distinct USPS-recognized cities.

Population moved from 125,161 to 120,178 from 2014 to 2024 — a -4.0% change. 9 ZIPs gained residents, 8 lost.

The county's wealthiest ZIP 87418 (La Plata, $82,750 median) and poorest ZIP 87037 (Nageezi, $19,044) are 57.3 miles apart — a 4.3× income gap across local geography.

Median home values vary 12.6× across this county — from $22,500 in 87455 (Newcomb) to $284,200 in 87402 (Farmington).

Density varies 467× across the county — from 1 people/sq mi in 87412 (Blanco) to 612 in 87402 (Farmington).

Educational attainment ranges from 0.3% bachelor's+ in 87037 (Nageezi) to 28.4% in 87402 (Farmington) — the breadth of educational profiles across the area.

Within New Mexico, this is the #48 most populous of 65 counties and ranks #42 for median household income .

Weighted by population, the typical household earns about $57,082 across the county — reflecting what a typical resident sees, not a simple ZIP average.

18.3% of adults age 25+ hold a bachelor's degree or higher (14,614 of 79,992 reporting). The most-educated ZIPs cluster around Farmington.

12 Standard delivery, 5 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about San Juan County


Two counties in one

Median household income spans 4.3× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.

Wealthiest ZIP
La Plata
Median income: $82,750
Population: 686
Bachelor's+: 27.5%
vs
Poorest ZIP (pop >= 500)
Nageezi
Median income: $19,044
Population: 1,481
Bachelor's+: 0.3%
For every $1 of household income in 87037, the typical household in 87418 earns $4.35.

Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
4,487
square miles
Avg density
26.8
people per sq mi
Population
120,178
across 17 ZIPs
Bloomfield
742.6 sq mi
14,296 residents
Nageezi
712.0 sq mi
1,481 residents
Blanco
594.4 sq mi
779 residents

All ZIP Codes in San Juan County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
87401FarmingtonStandard45,229$61,886301.9-2.2%
87410AztecStandard15,012$55,189261.6-14.1%
87413BloomfieldStandard14,296$49,869742.6-11.3%
87402FarmingtonStandard11,418$79,46118.68.4%
87420ShiprockStandard10,586$36,33577.8-18.4%
87417KirtlandStandard6,624$75,21538.916.8%
87416FruitlandStandard4,546$49,97326.8-13.3%
87415Flora VistaStandard2,273$44,09526.832.7%
87364Sheep SpringsPO Box1,632$32,500180.359.2%
87037NageeziPO Box1,481$19,044712.0111.6%
87455NewcombPO Box1,480$38,167387.7-14.4%
87421WaterflowStandard1,468$51,029177.4-6.7%
87461SanosteePO Box1,307$32,981297.23.8%
87499FarmingtonPO Box903$40,662167.786.2%
87412BlancoStandard779$55,417594.418.4%
87418La PlataStandard686$82,75086.6-54.5%
87419Navajo DamStandard458$21,007388.998.3%

Adjacent & Nearby Counties