Demographics of Sanders County, Montana

Sanders County, Montana had 14,062 people on July 1, 2025, by the Census Bureau’s estimate: +1,608 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Sanders County, in four figures

14,062
Population: July 1, 2025, Vintage 2025 estimate.; +12.9%
Change since July 2020: +1,608 people.; 54.6 ±0.4
Median age: ACS 2020–⁠2024.; $57,476 ±$6,047
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Sanders County, Montana's population grew 12.9% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Sanders County, Montana's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Sanders County, Montana's population grew 12.9% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Sanders County, Montana's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	12,454	100.0	100.0
2021	12,933	103.8	100.2
2022	13,373	107.4	100.7
2023	13,713	110.1	101.6
2024	13,892	111.5	102.5
2025	14,062	112.9	103.1

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Population of Sanders County, Montana on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	12,454	+59	−10	0	+78
2021	12,933	+479	−130	+3	+651
2022	13,373	+440	−114	+2	+520
2023	13,713	+340	−49	0	+381
2024	13,892	+179	−39	0	+217
2025	14,062	+170	−35	−4	+210

Age, 2020–2024

The median age is 54.6 ±0.4: for men 54.6 ±0.9 and for women 54.6 ±0.5. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Sanders County by age, ACS 2020–2024
Age	People	Share	Montana	United States
Under 5	513 ±39	3.9% ±0.3	5.2% ±<0.1	5.6% ±<0.1
5 to 17	1,752 ±154	13.2% ±1.2	15.8% ±0.2	16.3% ±<0.1
18 to 24	947 ±168	7.1% ±1.3	9.0% ±0.2	9.1% ±<0.1
25 to 44	2,086 ±168	15.7% ±1.3	25.8% ±0.2	26.9% ±<0.1
45 to 64	3,603 ±244	27.1% ±1.8	24.1% ±0.2	24.8% ±<0.1
65 and over	4,384 ±370	33.0% ±2.8	20.1% ±0.2	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $57,476 ±$6,047, and income per person $32,019 ±$2,994, in 2024 dollars. The median is $72,509 ±$761 in Montana and $80,734 ±$166 in the United States.

Households by income

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Households in Sanders County by income, ACS 2020–2024
Household income	Households	Share	Montana	United States
Under $25,000	1,193 ±205	21.9% ±3.7	15.0% ±0.4	14.6% ±<0.1
$25,000 to $49,999	1,114 ±192	20.4% ±3.4	19.4% ±0.5	16.7% ±<0.1
$50,000 to $74,999	1,045 ±192	19.2% ±3.4	17.3% ±0.4	15.5% ±<0.1
$75,000 to $99,999	794 ±194	14.6% ±3.5	13.6% ±0.4	12.6% ±<0.1
$100,000 to $149,999	798 ±207	14.6% ±3.8	17.4% ±0.4	17.5% ±<0.1
$150,000 to $199,999	313 ±111	5.7% ±2.0	8.2% ±0.3	9.6% ±<0.1
$200,000 or more	194 ±71	3.6% ±1.3	9.0% ±0.3	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Sanders County by age, ACS 2020–2024
Age	Below poverty	Rate	Montana	United States
All ages	2,025 ±404	15.4% ±3.1	11.5% ±0.3	12.5% ±0.1
Under 18	517 ±193	23.8% ±8.3	12.7% ±0.6	16.1% ±0.1
18 to 59	978 ±228	18.7% ±4.2	11.7% ±0.4	11.6% ±0.1
60 and over	530 ±142	9.3% ±2.4	10.3% ±0.4	11.0% ±<0.1

Housing, 2020–2024

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Housing in Sanders County, ACS 2020–2024
Measure	Sanders County	Montana	United States
Housing units	6,808 ±36	528,419 ±3,257	143,775,355 ±10,234
Occupied	80.1% ±3.0	86.8% ±0.5	89.9% ±0.1
Vacant	19.9% ±3.0	13.2% ±0.3	10.1% ±0.1
Owner occupied	81.3% ±2.0	69.2% ±0.6	65.2% ±0.3
Renter occupied	18.7% ±3.2	30.8% ±0.4	34.8% ±0.1
Median home value	$359,000 ±$20,498	$375,800 ±$3,433	$332,700 ±$236
Median gross rent	$820 ±$54	$1,081 ±$14	$1,413 ±$2
Median year built	1992 ±4	1981 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Sanders County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Montana	United States
Hispanic or Latino	466 ±0	3.5% ±<0.1	4.6% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	11,730 ±109	88.3% ±0.8	83.6% ±0.2	57.4% ±<0.1
Black alone, not Hispanic	9 to 57	0.1% to 0.4%	0.4% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	60 ±27	0.5% ±0.2	0.8% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	331 ±95	2.5% ±0.7	5.3% ±0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 30	0% to 0.2%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 21	0% to 0.2%	0.5% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	641 ±157	4.8% ±1.2	4.7% ±0.2	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Sanders County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Montana	United States
Born in the state	4,571 ±414	34.4% ±3.1	52.1% ±0.5	57.3% ±<0.1
Born in another state	8,451 ±414	63.6% ±3.1	44.8% ±0.4	26.9% ±<0.1
Born a citizen outside the states	18 to 60	0.1% to 0.5%	0.8% ±0.1	1.7% ±<0.1
Born abroad	224 ±79	1.7% ±0.6	2.3% ±0.1	14.1% ±<0.1
Naturalized citizens	191 ±80	1.4% ±0.6	1.2% ±0.1	7.4% ±<0.1
Not citizens	12 to 54	0.1% to 0.4%	1.1% ±0.1	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Sanders County among the counties of Montana

13th of 56 by population, July 2025. Every one is listed on the Montana page.

Counties of Montana near Sanders County in population, July 2025
County	July 2025	Change since 2020
Silver Bow County	36,118	+2.6%
Lake County	33,392	+6.9%
Lincoln County	22,328	+13.1%
Park County	18,214	+5.7%
Hill County	16,167	−0.5%
Sanders County	14,062	+12.9%
Glacier County	13,463	−2.0%
Jefferson County	13,329	+9.8%
Big Horn County	12,752	−2.5%
Custer County	12,034	+1.5%
Fergus County	11,825	+3.1%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026