What is the property tax rate in Los Alamos County?

The effective rate is 0.55%: homeowners paid a median $2,717 a year on a median home value of $495,800 (Census ACS 2020-2024). The New Mexico rate is 0.70% and the US rate 0.94%.

How much is property tax on a $300,000 house in Los Alamos County?

About $1,644 a year ($137 a month) at the county's effective rate of 0.55%. Your bill depends on your assessed value, local levies and exemptions.

Is property tax in Los Alamos County high?

Los Alamos County's rate is 21% lower than the New Mexico rate and 42% lower than the US rate. It ranks 17th of 33 counties in New Mexico and 2,461 of 3,134 US counties (1 = highest).

Why might my bill be different?

The rate here is an average across homeowners. Bills depend on when the home was last assessed, the levies of your city and school district, and exemptions or caps you qualify for.

Property taxNew MexicoCensus ACS 2020–2024

Los Alamos County, New Mexico property tax rate

Homeowners in Los Alamos County pay a median $2,717 a year in property tax, an effective rate of 0.55% of home value.The median home is worth $495,800. That rate is 21% lower than the New Mexico rate (0.70%) and 42% lower than the US rate (0.94%). It is the 17th highest of 33 counties in New Mexico.

Effective rate

0.55%

#17 of 33 in NM · #2,461 of 3,134 in the US

Median tax paid

$2,717

± $148 · US $3,119

Median home value

$495,800

US $332,700

Paid by homeowners

$18.3 million

a year, 6,171 owner-occupied homes

Compared with the state and the US

Los Alamos County's rate is 42% lower than the US rate

Effective property tax rate (median tax ÷ median home value). Grey ticks: the other 32 counties in New Mexico.

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates.

Estimate your property tax in Los Alamos County

Home value × the county's effective rate. Change the value to see your estimate.

Home value

Estimated property tax a year

$2,717

$226 a month at 0.55%, the effective rate for Los Alamos County.

At the New Mexico rate (0.70%)	$3,459
At the US rate (0.94%)	$4,648

An estimate from Census averages, not your bill. Your tax depends on your assessed value, local levies and any exemptions (homestead, senior, veteran) you claim.

Neighbouring counties

Sandoval County has the highest rate next to Los Alamos County

Effective property tax rate of every county that borders Los Alamos County

County	Effective rate
Sandoval County median $2,296	0.73%
Los Alamos County median $2,717	0.55%
Santa Fe County median $2,152	0.48%
Rio Arriba County median $1,021	0.42%

U.S. Census Bureau, ACS 2020–2024 5-year estimates; county adjacency file 2024.

What homeowners pay

40% of Los Alamos County homeowners pay $3,000 or more a year (US 49%)

Owner-occupied homes by yearly real estate taxes paid, with and without a mortgage combined

Yearly property tax paid	Share of homeowners
No real estate taxes paid	4%
Less than $800	3%
$800 to $1,499	13%
$1,500 to $1,999	12%
$2,000 to $2,999	27%
$3,000 or more	40%

U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25102.

Median tax with a mortgage: $2,755; without a mortgage: $2,645. Homes with a mortgage tend to be newer, bought more recently and worth more.

Five years earlier

The median tax bill rose 36% between the 2015–2019 and 2020–2024 surveys while median home value rose 64%, so the effective rate went down from 0.66% to 0.55%.

	2015–2019	2020–2024	Change
Median property tax paid	$1,997	$2,717	+36%
Median home value	$302,800	$495,800	+64%
Effective rate	0.66%	0.55%	-0.11 pts

Where to check your own bill

Your actual bill is set locally: the county assessor values your home, and the county, city, school district and other local districts each set a rate on that value. Exemptions such as a homestead exemption can cut the bill. Check your assessment and bill with the Los Alamos County assessor or tax collector.

State rules and exemptions: New Mexico Taxation and Revenue Department, property tax.

Questions and answers

What is the property tax rate in Los Alamos County?: The effective rate is 0.55%: homeowners paid a median $2,717 a year on a median home value of $495,800 (Census ACS 2020-2024). The New Mexico rate is 0.70% and the US rate 0.94%.
How much is property tax on a $300,000 house in Los Alamos County?: About $1,644 a year ($137 a month) at the county's effective rate of 0.55%. Your bill depends on your assessed value, local levies and exemptions.
Is property tax in Los Alamos County high?: Los Alamos County's rate is 21% lower than the New Mexico rate and 42% lower than the US rate. It ranks 17th of 33 counties in New Mexico and 2,461 of 3,134 US counties (1 = highest).
Why might my bill be different?: The rate here is an average across homeowners. Bills depend on when the home was last assessed, the levies of your city and school district, and exemptions or caps you qualify for.

New Mexico property tax rates by county0.70%
Property taxes by stateall 50 states and DC
Property tax calculatorany US county
Where do my state taxes go in New Mexico?state budget
New Mexico income tax calculatortake-home pay

Sources and notes

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates (released December 2025), tables B25103 (median real estate taxes paid by mortgage status), B25077 (median value), B25102 (mortgage status by real estate taxes paid), B25090 and B25082 (aggregate taxes paid and aggregate value) and B25003 (tenure). Owner-occupied homes. Public domain.
Five years earlier: ACS 2015–2019 5-year estimates, tables B25103 and B25077. Dollars are nominal.
Effective rate = median real estate taxes paid ÷ median home value. Taxes are what homeowners report paying for the year; values are what they say the home would sell for. Where the Census Bureau caps the median tax at “$10,000+”, the rate is total taxes paid ÷ total home value instead. ± figures are the Census 90% margins of error.
Page built 2026-10-10.