Rio Arriba County, NM Property Tax: $1,000/yr (2026)
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The effective property tax rate in Rio Arriba County is 0.43% of assessed home value. On a home at the county median value of $230,900, that works out to about $993 per year, or $83 per month. Rio Arriba County is located in northern New Mexico, and is home to approximately 40,165 residents.
About Rio Arriba County
Rio Arriba County covers approximately 5,860.9 square miles in New Mexico. The county is home to about 40,165 residents living in roughly 19,703 housing units, of which 59.4% are owner-occupied. The median household income is $53,901, and the median home was built in 1983.
Rio Arriba County borders Archuleta County, Conejos County, Los Alamos County, Mora County, Sandoval 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 Rio Arriba County Assessor's office to learn which exemptions apply to your property and when to file.
Rio Arriba County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Rio Arriba County, NM | 0.43% | $230,900 | $993 |
| New Mexico state average | 0.60% | — | $1,385* |
| Archuleta County | 0.34% | $451,400 | $1,541 |
| Conejos County | 0.40% | $162,100 | $655 |
| Los Alamos County | 0.57% | $452,500 | $2,591 |
| Mora County | 0.54% | $119,900 | $642 |
| Sandoval County | 0.76% | $282,300 | $2,147 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Rio Arriba County's median home value of $230,900. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Rio Arriba County's property tax rate compare to the rest of New Mexico?
At 0.43%, Rio Arriba County is lower than the New Mexico state average of 0.60%. On a home at the county median of $230,900, that means about $993 per year — versus $1,385 at the state average rate, a difference of $392 per year. Compared to the national average of 1.10%, Rio Arriba County is below average.
What's a typical annual property tax bill in Rio Arriba County?
For a home at the county median value of $230,900, the annual property tax in Rio Arriba County is approximately $993 — or about $83 per month. For a home worth $346,350, expect around $1,489 per year. For a $461,800 home, approximately $1,986 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Rio Arriba County property tax assessment?
Property assessment appeals in Rio Arriba County are handled by the Rio Arriba 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 Rio Arriba 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 0.43% shown here. Contact the Rio Arriba 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