Treasure County, Montana Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 55th-largest in Montana
The population of Treasure County, Montana is 761 as of the 2023 American Community Survey, making it the 55th-largest county in Montana. The median household income is $73,036, the median home value is $215,300, and the median age is 53.4.
The population of Treasure County has grown 3.5% since 2010 (714 → 739), a +0.25% annualized rate.
761
Population
+0.25%
Annual growth
1
People / sq mi
$73,036
Median Income
$215,300
Median Home Value
Treasure County covers 978 sq mi of land at 0.8 people per square mile.
About Treasure County, MT
Treasure County stands apart on settlement density — it is among the most sparsely settled of US counties, at roughly 1 people per square mile. With 761 residents, Treasure County is a county in Montana.
Median household income is $73,036, below the US median of $78,538. Only 6.5% of residents live in poverty, below the national 12.4%. Median home value is $215,300, with typical rent around $992.
Educational attainment is on the higher side for US counties — 32.8% of adults hold a four-year degree, below the national 35.0%. Remote work is widespread — 20.6% of workers stay home, above the national 14.0%, and the average commute runs about 17 minutes each way.
Treasure County Population History (2010-2024)
The county of Treasure County had a population of 714 in 2010 and 739 in 2024, a 3.5% growth over 14 years. The peak was 768 in 2021. Average annual growth rate: 0.30%.
739
Population (2024)
714
Population (2010)
768
Peak (2021)
0.30%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 714 |
| 2011 | 709 |
| 2012 | 717 |
| 2013 | 688 |
| 2014 | 684 |
| 2015 | 680 |
| 2016 | 678 |
| 2017 | 668 |
| 2018 | 667 |
| 2019 | 697 |
| 2020 | 758 |
| 2021 | 768 |
| 2022 | 749 |
| 2023 | 767 |
| 2024 | 739 |
Race & Ethnicity
| White | 93.7% |
| Black or African American | 0.0% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.1% |
| Two or More Races | 0.0% |
Age & Sex
53.4
Median Age
46.0%
Female
54.0%
Male
22.6%
Age 65+
Age Distribution
Children (under 15): 14.5% · Seniors (65+): 22.6%
Income & Poverty
| Median household income | $73,036+$3,114 vs state |
| Mean household income | $94,624 |
| Per-capita income | $45,882 |
| Poverty rate | 6.5%-0.6% vs state |
| Unemployment rate | 0.8% |
| Employment-to-population | 68.2% |
Top Industries by Employment
The largest employment sector in Treasure County is agriculture, accounting for 40.6% of workers.
How residents commute
0.0%
Drive alone
1.4%
Carpool
73.2%
Public transit
20.6%
Work from home
17.2 min
Avg commute
Housing
$215,300$-122,800 vs state
Median home value
$992
Median rent
66.5%
Homeownership rate
479
Total housing units
79.7%
Occupied
20.3%
Vacant
33.5%
Renter-occupied
Social & access
94.6%
With health insurance
94.0%
With broadband internet
35.9%
Foreign-born
9.4%
Veterans (18+)
14.8%
With a disability
97.7%
Speak language other than English at home
Education
94.9%
High School+
32.8%
Bachelor's+
Largest cities in Montana
Other counties in Montana
Part of Montana
Metro areas in Montana
County rankings
Frequently Asked Questions
Treasure County, Montana has a population of 761 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 55th-largest county in Montana. Population density is 1 people per square mile.
The population of Treasure County has grown 3.5% since 2010 (714 → 739), a +0.25% annualized rate.
The median household income in Treasure County, Montana is $73,036, with mean (average) household income of $94,624 and per-capita income of $45,882. 6.5% of residents live below the federal poverty level.
In Treasure County, the largest racial and ethnic groups are White (93.7%), Hispanic or Latino (0.1%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Treasure County, Montana is 53.4 years. Residents are 46.0% female and 54.0% male.
The median home value in Treasure County is $215,300 and median monthly rent is $992. 66.5% of occupied housing units are owner-occupied. The county has 479 total housing units, 20.3% of which are vacant.
The largest employment sector in Treasure County, Montana is agriculture, forestry, fishing, and mining, employing 40.6% of workers. The unemployment rate is 0.8%.
Billings is among the largest cities associated with Treasure County, Montana, with a population of 118,321.
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Statewide data for Montana
Population, race, income, age, and trends across Montana
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.