Sierra County, NM Property Tax: $793/yr (2026)
Last reviewed:
The effective property tax rate in Sierra County is 0.55% of assessed home value. On a home at the county median value of $144,800, that works out to about $796 per year, or $66 per month. Sierra County is located in southwestern New Mexico, and is home to approximately 11,511 residents.
About Sierra County
Sierra County covers approximately 4,181.2 square miles in New Mexico. The county is home to about 11,511 residents living in roughly 8,139 housing units, of which 46.8% are owner-occupied. The median household income is $37,840, and the median home was built in 1983.
Sierra County borders Catron County, Doña Ana County, Grant County, Lincoln County, Luna 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 Sierra County Assessor's office to learn which exemptions apply to your property and when to file.
Sierra County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Sierra County, NM | 0.55% | $144,800 | $796 |
| New Mexico state average | 0.60% | — | $869* |
| Catron County | 0.34% | $171,800 | $583 |
| Doña Ana County | 0.68% | $205,400 | $1,404 |
| Grant County | 0.46% | $164,400 | $756 |
| Lincoln County | 0.54% | $212,200 | $1,143 |
| Luna County | 0.58% | $112,500 | $648 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Sierra County's median home value of $144,800. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Sierra County's property tax rate compare to the rest of New Mexico?
At 0.55%, Sierra County is lower than the New Mexico state average of 0.60%. On a home at the county median of $144,800, that means about $796 per year — versus $869 at the state average rate, a difference of $73 per year. Compared to the national average of 1.10%, Sierra County is below average.
What's a typical annual property tax bill in Sierra County?
For a home at the county median value of $144,800, the annual property tax in Sierra County is approximately $796 — or about $66 per month. For a home worth $217,200, expect around $1,195 per year. For a $289,600 home, approximately $1,593 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Sierra County property tax assessment?
Property assessment appeals in Sierra County are handled by the Sierra 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 Sierra 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 0.55% shown here. Contact the Sierra 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