Los Alamos County, NM Property Tax Rate
Homeowners in Los Alamos County pay an effective 0.57% of home value in property tax — about $2,579 a year on the median $452,500 home, above the New Mexico county median of 0.55%.
Los Alamos County, NM: 0.57% effective property tax — ~$2,579/yr on the median home.
- Effective rate0.57%
- Median home value$452,500
- Median annual bill$2,579
- NM county median0.55%
- U.S. county median0.84%
Source: U.S. Census ACS 2023 5-year (median taxes paid ÷ median value), compiled June 2026.
Los Alamos County vs. New Mexico and the U.S.
| Effective rate | On the county's $452,500 median home | |
|---|---|---|
| Los Alamos County | 0.57% | $2,579 |
| New Mexico county median | 0.55% | $2,489 |
| U.S. county median | 0.84% | $3,801 |
Median household income here is $143,188, putting the median tax bill at about 1.8% of income. Effective rates fold in homestead exemptions and assessment practice — they're what owners actually pay, which is why they beat statutory rates for comparison.
Highest & lowest rates in New Mexico
| County | Effective rate | Median bill |
|---|---|---|
| McKinley County | 1.89% | $1,363 |
| Bernalillo County | 0.95% | $2,551 |
| Cibola County | 0.82% | $984 |
| Sandoval County | 0.76% | $2,145 |
| Taos County | 0.33% | $1,168 |
| Catron County | 0.34% | $584 |
| Harding County | 0.38% | $329 |
| Rio Arriba County | 0.43% | $993 |
Full picture: New Mexico property tax calculator · interactive county atlas · all county pages.
Frequently asked questions
What is the property tax rate in Los Alamos County, NM?
The effective rate is about 0.57% of home value — the median homeowner pays roughly $2,579 a year on a $452,500 median home (ACS 2023 five-year data).
Is Los Alamos County's property tax high?
It's above the New Mexico county median (0.55%) and below the U.S. county median (0.84%).
How is the effective rate calculated?
Median real-estate taxes paid ÷ median home value, from the Census American Community Survey — what owners actually pay, after exemptions, rather than the statutory millage.
Sources & methodology
Sources: Census ACS 2023 5-year tables B25103/B25077.
Effective rate = median real-estate taxes ÷ median home value (owner-occupied). Individual bills vary with exemptions, assessment timing and local levies — verify with the county assessor.