Demographics of Phillips County, Montana

Phillips County, Montana had 4,203 people on July 1, 2025, by the Census Bureau’s estimate: −5 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.

Phillips County, in four figures

4,203
Population: July 1, 2025, Vintage 2025 estimate.; −0.1%
Change since July 2020: −5 people.; 45.6 ±1.3
Median age: ACS 2020–⁠2024.; $53,417 ±$2,401
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.

Phillips County, Montana's population shrank 0.1% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Phillips 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

Phillips County, Montana's population shrank 0.1% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Phillips 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	4,208	100.0	100.0
2021	4,204	99.9	100.2
2022	4,216	100.2	100.7
2023	4,237	100.7	101.6
2024	4,196	99.7	102.5
2025	4,203	99.9	103.1

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Population of Phillips 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	4,208	−8	−1	0	−8
2021	4,204	−4	−18	0	+14
2022	4,216	+12	−24	0	+35
2023	4,237	+21	−8	0	+29
2024	4,196	−41	−13	+7	−35
2025	4,203	+7	−14	+6	+17

Age, 2020–2024

The median age is 45.6 ±1.3: for men 45.0 ±1.6 and for women 46.5 ±2.0. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Phillips County by age, ACS 2020–2024
Age	People	Share	Montana	United States
Under 5	256 ±100	6.1% ±2.4	5.2% ±<0.1	5.6% ±<0.1
5 to 17	731 ±137	17.3% ±3.2	15.8% ±0.2	16.3% ±<0.1
18 to 24	234 ±87	5.5% ±2.1	9.0% ±0.2	9.1% ±<0.1
25 to 44	844 ±152	20.0% ±3.6	25.8% ±0.2	26.9% ±<0.1
45 to 64	1,143 ±193	27.1% ±4.6	24.1% ±0.2	24.8% ±<0.1
65 and over	1,013 ±145	24.0% ±3.4	20.1% ±0.2	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $53,417 ±$2,401, and income per person $33,106 ±$3,668, 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 Phillips County by income, ACS 2020–2024
Household income	Households	Share	Montana	United States
Under $25,000	314 ±100	17.8% ±5.6	15.0% ±0.4	14.6% ±<0.1
$25,000 to $49,999	469 ±138	26.6% ±7.6	19.4% ±0.5	16.7% ±<0.1
$50,000 to $74,999	409 ±111	23.2% ±6.1	17.3% ±0.4	15.5% ±<0.1
$75,000 to $99,999	126 ±52	7.1% ±2.9	13.6% ±0.4	12.6% ±<0.1
$100,000 to $149,999	206 ±77	11.7% ±4.3	17.4% ±0.4	17.5% ±<0.1
$150,000 to $199,999	176 ±82	10.0% ±4.6	8.2% ±0.3	9.6% ±<0.1
$200,000 or more	19 to 111	1.1% to 6.3%	9.0% ±0.3	13.4% ±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%.

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 Phillips County by age, ACS 2020–2024
Age	Below poverty	Rate	Montana	United States
All ages	434 ±150	10.5% ±3.6	11.5% ±0.3	12.5% ±0.1
Under 18	65 to 301	7.3% to 30.5%	12.7% ±0.6	16.1% ±0.1
18 to 59	219 ±88	12.1% ±4.8	11.7% ±0.4	11.6% ±0.1
60 and over	12 to 52	0.9% to 3.8%	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

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Housing in Phillips County, ACS 2020–2024
Measure	Phillips County	Montana	United States
Housing units	2,233 ±15	528,419 ±3,257	143,775,355 ±10,234
Occupied	79.0% ±4.5	86.8% ±0.5	89.9% ±0.1
Vacant	21.0% ±4.5	13.2% ±0.3	10.1% ±0.1
Owner occupied	73.5% ±6.9	69.2% ±0.6	65.2% ±0.3
Renter occupied	26.5% ±5.9	30.8% ±0.4	34.8% ±0.1
Median home value	$197,600 ±$44,618	$375,800 ±$3,433	$332,700 ±$236
Median gross rent	$536 ±$183	$1,081 ±$14	$1,413 ±$2
Median year built	1974 ±6	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 Phillips County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Montana	United States
Hispanic or Latino	0 to 92	0% to 2.2%	4.6% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	3,420 ±84	81.0% ±2.0	83.6% ±0.2	57.4% ±<0.1
Black alone, not Hispanic	0 to 36	0% to 0.9%	0.4% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 80	0% to 1.9%	0.8% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	316 ±107	7.5% ±2.5	5.3% ±0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 32	0% to 0.8%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 38	0% to 0.9%	0.5% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	367 ±121	8.7% ±2.9	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 Phillips County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Montana	United States
Born in the state	3,249 ±205	77.0% ±4.9	52.1% ±0.5	57.3% ±<0.1
Born in another state	840 ±169	19.9% ±4.0	44.8% ±0.4	26.9% ±<0.1
Born a citizen outside the states	0 to 48	0% to 1.1%	0.8% ±0.1	1.7% ±<0.1
Born abroad	38 to 182	0.9% to 4.3%	2.3% ±0.1	14.1% ±<0.1
Naturalized citizens	0 to 94	0% to 2.2%	1.2% ±0.1	7.4% ±<0.1
Not citizens	11 to 121	0.3% to 2.9%	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%.

Phillips County among the counties of Montana

38th of 56 by population, July 2025. Every one is listed on the Montana page.

Counties of Montana near Phillips County in population, July 2025
County	July 2025	Change since 2020
Pondera County	6,072	+3.2%
Chouteau County	5,865	−0.8%
Musselshell County	5,582	+17.6%
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%

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