San Juan County, NM Property Tax: $1,249/yr (2026)
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The effective property tax rate in San Juan County is 0.67% of assessed home value. On a home at the county median value of $185,100, that works out to about $1,240 per year, or $103 per month. San Juan County is located in northwestern New Mexico, and is home to approximately 121,178 residents.
About San Juan County
San Juan County covers approximately 5,517.2 square miles in New Mexico. The county is home to about 121,178 residents living in roughly 48,085 housing units, of which 59.9% are owner-occupied. The median household income is $53,020, and the median home was built in 1986.
San Juan County borders Apache County, Archuleta County, La Plata County, Montezuma County, McKinley County — useful comparisons if you're considering nearby areas with potentially different tax rates.
How Property Taxes Work in New Mexico
Property taxes in New Mexico are administered at the county level. Each county sets a millage rate applied to the assessed value of real property — the effective rate above accounts for any partial assessments and exemptions already built into the local tax base. Assessed value can differ meaningfully from current market value depending on how often the county reassesses and what fraction of market value it uses.
Most counties in New Mexico offer exemptions that reduce the taxable assessed value: homestead exemptions for primary residences, senior exemptions, disability exemptions, and veteran exemptions are common. These reduce your effective rate below the county-wide average shown here. Contact the San Juan County Assessor's office to learn which exemptions apply to your property and when to file.
San Juan County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| San Juan County, NM | 0.67% | $185,100 | $1,240 |
| New Mexico state average | 0.60% | — | $1,111* |
| Apache County | 0.84% | $68,500 | $574 |
| Archuleta County | 0.34% | $451,400 | $1,541 |
| La Plata County | 0.26% | $549,100 | $1,452 |
| Montezuma County | 0.30% | $308,100 | $915 |
| McKinley County | 1.89% | $72,100 | $1,362 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at San Juan County's median home value of $185,100. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does San Juan County's property tax rate compare to the rest of New Mexico?
At 0.67%, San Juan County is higher than the New Mexico state average of 0.60%. On a home at the county median of $185,100, that means about $1,240 per year — versus $1,111 at the state average rate, a difference of $129 per year. Compared to the national average of 1.10%, San Juan County is below average.
What's a typical annual property tax bill in San Juan County?
For a home at the county median value of $185,100, the annual property tax in San Juan County is approximately $1,240 — or about $103 per month. For a home worth $277,650, expect around $1,860 per year. For a $370,200 home, approximately $2,480 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a San Juan County property tax assessment?
Property assessment appeals in San Juan County are handled by the San Juan County Assessor's office. Most jurisdictions require filing within 30–90 days of receiving your assessment notice — confirm the specific deadline with the assessor's office before submitting, as deadlines and procedures vary by county. A successful appeal can reduce your assessed value and lower your tax bill for the current and future tax years.
What exemptions are available in San Juan County?
New Mexico counties commonly offer homestead exemptions for owner-occupied primary residences, senior citizen exemptions for qualifying homeowners aged 65 and older, exemptions for disabled residents, and veterans' exemptions. Each exemption reduces your assessed taxable value, which in turn reduces your effective tax rate below the county-wide 0.67% shown here. Contact the San Juan County Assessor's office to confirm which exemptions are available and the application deadlines.
Data sources: US Census Bureau ACS 2023 5-Year Estimates, US Census Gazetteer (2024), County Adjacency File