Alamosa County, CO Property Tax: $968/yr (2026)
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The effective property tax rate in Alamosa County is 0.44% of assessed home value. On a home at the county median value of $218,800, that works out to about $963 per year, or $80 per month. Alamosa County is located in southern Colorado, and is home to approximately 16,515 residents.
About Alamosa County
Alamosa County covers approximately 722.6 square miles in Colorado. The county is home to about 16,515 residents living in roughly 7,148 housing units, of which 51.8% are owner-occupied. The median household income is $51,445, and the median home was built in 1984.
Alamosa County borders Conejos County, Costilla County, Huerfano County, Rio Grande County, Saguache County — useful comparisons if you're considering nearby areas with potentially different tax rates.
How Property Taxes Work in Colorado
Property taxes in Colorado 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 Colorado 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 Alamosa County Assessor's office to learn which exemptions apply to your property and when to file.
Alamosa County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Alamosa County, CO | 0.44% | $218,800 | $963 |
| Colorado state average | 0.39% | — | $853* |
| Conejos County | 0.40% | $162,100 | $655 |
| Costilla County | 0.31% | $171,300 | $531 |
| Huerfano County | 0.28% | $256,700 | $707 |
| Rio Grande County | 0.41% | $215,400 | $893 |
| Saguache County | 0.34% | $200,000 | $679 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Alamosa County's median home value of $218,800. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Alamosa County's property tax rate compare to the rest of Colorado?
At 0.44%, Alamosa County is higher than the Colorado state average of 0.39%. On a home at the county median of $218,800, that means about $963 per year — versus $853 at the state average rate, a difference of $110 per year. Compared to the national average of 1.10%, Alamosa County is below average.
What's a typical annual property tax bill in Alamosa County?
For a home at the county median value of $218,800, the annual property tax in Alamosa County is approximately $963 — or about $80 per month. For a home worth $328,200, expect around $1,444 per year. For a $437,600 home, approximately $1,925 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Alamosa County property tax assessment?
Property assessment appeals in Alamosa County are handled by the Alamosa 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 Alamosa County?
Colorado 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 0.44% shown here. Contact the Alamosa 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