Demographics of Sheridan County, Montana

Sheridan County, Montana had 3,436 people on July 1, 2025, by the Census Bureau’s estimate: −104 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.

Sheridan County, in four figures

3,436
Population: July 1, 2025, Vintage 2025 estimate.; −2.9%
Change since July 2020: −104 people.; 43.1 ±2.0
Median age: ACS 2020–⁠2024.; $70,147 ±$15,093
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.

Sheridan County, Montana's population shrank 2.9% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Sheridan 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

Sheridan County, Montana's population shrank 2.9% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Sheridan 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	3,540	100.0	100.0
2021	3,577	101.0	100.2
2022	3,555	100.4	100.7
2023	3,492	98.6	101.6
2024	3,478	98.2	102.5
2025	3,436	97.1	103.1

3 more columns on a wider screen

Population of Sheridan 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	3,540	−7	+4	0	−10
2021	3,577	+37	−4	+1	+41
2022	3,555	−22	−27	+1	+4
2023	3,492	−63	−27	0	−35
2024	3,478	−14	−27	+19	−5
2025	3,436	−42	−28	+19	−32

Age, 2020–2024

The median age is 43.1 ±2.0: for men 41.9 ±1.8 and for women 43.8 ±2.5. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

2 more columns on a wider screen

People in Sheridan County by age, ACS 2020–2024
Age	People	Share	Montana	United States
Under 5	264 ±34	7.2% ±0.9	5.2% ±<0.1	5.6% ±<0.1
5 to 17	538 ±87	14.7% ±2.2	15.8% ±0.2	16.3% ±<0.1
18 to 24	242 ±76	6.6% ±2.0	9.0% ±0.2	9.1% ±<0.1
25 to 44	856 ±92	23.3% ±2.2	25.8% ±0.2	26.9% ±<0.1
45 to 64	936 ±102	25.5% ±2.5	24.1% ±0.2	24.8% ±<0.1
65 and over	833 ±102	22.7% ±2.5	20.1% ±0.2	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $70,147 ±$15,093, and income per person $40,043 ±$3,237, in 2024 dollars. The median is $72,509 ±$761 in Montana and $80,734 ±$166 in the United States.

Households by income

2 more columns on a wider screen

Households in Sheridan County by income, ACS 2020–2024
Household income	Households	Share	Montana	United States
Under $25,000	260 ±71	17.6% ±4.7	15.0% ±0.4	14.6% ±<0.1
$25,000 to $49,999	325 ±71	22.0% ±4.6	19.4% ±0.5	16.7% ±<0.1
$50,000 to $74,999	182 ±50	12.3% ±3.3	17.3% ±0.4	15.5% ±<0.1
$75,000 to $99,999	243 ±50	16.5% ±3.2	13.6% ±0.4	12.6% ±<0.1
$100,000 to $149,999	233 ±59	15.8% ±3.8	17.4% ±0.4	17.5% ±<0.1
$150,000 to $199,999	119 ±55	8.1% ±3.7	8.2% ±0.3	9.6% ±<0.1
$200,000 or more	114 ±41	7.7% ±2.7	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).

2 more columns on a wider screen

Poverty rate in Sheridan County by age, ACS 2020–2024
Age	Below poverty	Rate	Montana	United States
All ages	374 ±118	10.4% ±3.2	11.5% ±0.3	12.5% ±0.1
Under 18	48 to 146	12.4% ±5.9	12.7% ±0.6	16.1% ±0.1
18 to 59	206 ±69	12.0% ±3.9	11.7% ±0.4	11.6% ±0.1
60 and over	34 to 108	3.2% to 9.8%	10.3% ±0.4	11.0% ±<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%.

Housing, 2020–2024

1 more column on a wider screen

Housing in Sheridan County, ACS 2020–2024
Measure	Sheridan County	Montana	United States
Housing units	2,041 ±78	528,419 ±3,257	143,775,355 ±10,234
Occupied	72.3% ±4.0	86.8% ±0.5	89.9% ±0.1
Vacant	27.7% ±5.1	13.2% ±0.3	10.1% ±0.1
Owner occupied	71.8% ±4.9	69.2% ±0.6	65.2% ±0.3
Renter occupied	28.2% ±5.6	30.8% ±0.4	34.8% ±0.1
Median home value	$124,000 ±$20,717	$375,800 ±$3,433	$332,700 ±$236
Median gross rent	$746 ±$60	$1,081 ±$14	$1,413 ±$2
Median year built	1963 ±3	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

2 more columns on a wider screen

People in Sheridan County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Montana	United States
Hispanic or Latino	145 ±41	4.0% ±1.1	4.6% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	3,236 ±165	88.2% ±6.4	83.6% ±0.2	57.4% ±<0.1
Black alone, not Hispanic	0 to 11	0% to 0.3%	0.4% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	8 to 40	0.2% to 1.1%	0.8% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	25 to 117	0.7% to 3.2%	5.3% ±0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 18	0% to 0.5%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 17	0% to 0.5%	0.5% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	180 ±54	4.9% ±1.5	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).

2 more columns on a wider screen

People in Sheridan County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Montana	United States
Born in the state	1,993 ±194	54.3% ±4.5	52.1% ±0.5	57.3% ±<0.1
Born in another state	1,493 ±146	40.7% ±3.4	44.8% ±0.4	26.9% ±<0.1
Born a citizen outside the states	32 to 134	0.9% to 3.6%	0.8% ±0.1	1.7% ±<0.1
Born abroad	100 ±42	2.7% ±1.1	2.3% ±0.1	14.1% ±<0.1
Naturalized citizens	13 to 59	0.4% to 1.6%	1.2% ±0.1	7.4% ±<0.1
Not citizens	28 to 100	0.8% to 2.7%	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%.

Sheridan County among the counties of Montana

41st of 56 by population, July 2025. Every one is listed on the Montana page.

Counties of Montana near Sheridan County in population, July 2025
County	July 2025	Change since 2020
Toole County	5,211	+4.9%
Mineral County	5,185	+13.5%
Phillips County	4,203	−0.1%
Sweet Grass County	3,762	+2.4%
Granite County	3,658	+10.6%
Sheridan County	3,436	−2.9%
Fallon County	2,959	−2.3%
Judith Basin County	2,162	+6.8%
Meagher County	2,137	+11.2%
Wheatland County	2,100	+1.2%
Liberty County	1,957	+0.1%

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