US Census Data

Petroleum County vs Prairie County

A side-by-side comparison of Petroleum County and Prairie County: population, income, housing, and more.

Petroleum County and Prairie County are counties in Montana. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Prairie County has the higher population (1,251 vs 401 in Petroleum County). Petroleum County has the higher median household income ($59,318 vs $45,192 in Prairie County). Petroleum County has the higher median home value ($173,700 vs $167,100 in Prairie County).

Population, income & housing

Petroleum CountyPrairie County
Population4011,251
Median age51.5 yrs49.1 yrs
Median household income$59,318$45,192
Median home value$173,700$167,100
Median gross rent$769$827
Housing units295667
Homeownership rate77.0%76.3%
Bachelor's degree or higher27.1%20.0%
Unemployment rate0.9%1.2%

Trends (ACS 5-year, 2019–2023)

Petroleum CountyPrairie County
Population453 → 401 (-11.5%)1,252 → 1,251 (-0.1%)
Median household income$51,250 → $59,318 (+15.7%)$43,625 → $45,192 (+3.6%)
Median home value$181,300 → $173,700 (-4.2%)$112,900 → $167,100 (+48.0%)
Median gross rent$490 → $769 (+56.9%)$715 → $827 (+15.7%)

Petroleum County

Population
453401
Median household income
$51,250$59,318
Median home value
$181,300$173,700
Median gross rent
$490$769

Prairie County

Population
1,2521,251
Median household income
$43,625$45,192
Median home value
$112,900$167,100
Median gross rent
$715$827

Age & race/ethnicity

Age distribution (share)

Petroleum CountyPrairie County
Under 54.0%4.1%
5 to 179.2%17.5%
18 to 245.0%2.2%
25 to 343.0%8.2%
35 to 4414.0%13.7%
45 to 5420.9%10.0%
55 to 6416.0%10.4%
65 to 7416.7%23.3%
75 and over11.2%10.6%

Race & ethnicity (share)

Petroleum CountyPrairie County
White (non-Hispanic)99.3%89.4%
Black or African American0.0%0.0%
American Indian & Alaska Native0.0%0.1%
Asian0.7%3.9%
Native Hawaiian & Pacific Islander0.0%0.0%
Some other race0.0%4.5%
Two or more races0.0%1.4%
Hispanic or Latino0.0%0.8%

Educational attainment (age 25+)

Share of adults 25+

Petroleum CountyPrairie County
No high school diploma1.2%11.5%
High school graduate44.5%34.7%
Some college or associate's27.1%33.7%
Bachelor's degree17.7%11.9%
Graduate or professional degree9.5%8.2%

Commute to work

How workers get to work (share)

Petroleum CountyPrairie County
Drove alone57.1%52.4%
Carpooled7.4%4.5%
Public transit0.0%0.2%
Walked22.1%8.0%
Bicycle0.0%0.0%
Worked from home13.4%31.8%
Other means0.0%3.1%

Housing

Units in structure (share)

Petroleum CountyPrairie County
1-unit, detached77.3%82.6%
1-unit, attached0.7%0.0%
2 to 4 units0.0%1.2%
5 to 19 units0.0%1.0%
20 or more units0.0%0.0%
Mobile home & other22.0%15.1%

Poverty & households

Petroleum CountyPrairie County
Poverty rate6.5%23.9%
Average household size2.012.35
Mean commute (minutes)1416
Median year structure built19781958

Full profiles

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