Petroleum County, MT
Demographics & Statistics
Updated: 2025-10-25
Updated: 2025-10-25
Life in Petroleum County research summary. HomeSnacks has been researching the quality of life in Petroleum County over the past eight years using Census data, FBI crime data, cost of living data, and other primary sources. Based on the most recently available data, we found the following about life in Petroleum County:
The population in Petroleum County is 401.
The median home value in Petroleum County is $171,291.
The median income in Petroleum County is $59,318.
The median rent in Petroleum County is $769.
The unemployment rate in Petroleum County is 0.9%.
The poverty rate in Petroleum County is 6.5%.
The average high in Petroleum County is 64.5° and there are 29.6 inches of rainfall annually.
The average high in Petroleum County is 64.5°.
There are 72.31 nice days each year.
Expect an average of 29.6 inches of rain each year with 11.3 inches of snow.
There is an average of 5:39 hours of sun each day in Petroleum County.
| Stat | Petroleum County |
|---|---|
| Mean High | 64.5 |
| Nice Days | 72.31 |
| Rainfall | 29.6 |
| Snowfall | 11.3 |
| Sunny Hours | 5:39 |
The current population in Petroleum County is 401. The population has decreased -4.2% from 2019.
| Year | Population | % Change |
|---|---|---|
| 2023 | 434 | -6.5% |
| 2022 | 464 | 2.4% |
| 2021 | 453 | - |
Petroleum County is 43.4% female with 174 female residents.
Petroleum County is 56.6% male with 226 male residents.
| Gender | Petroleum County | MT | USA |
|---|---|---|---|
| Female | 43.4% | 49.3% | 50.5% |
| Male | 56.6% | 50.7% | 49.5% |
Petroleum County is:
99.3% White with 398 White residents.
0.0% African American with 0 African American residents.
0.0% American Indian with 0 American Indian residents.
0.7% Asian with 3 Asian residents.
0.0% Hawaiian with 0 Hawaiian residents.
0.0% Other with 0 Other residents.
0.0% Two Or More with 0 Two Or More residents.
0.0% Hispanic with 0 Hispanic residents.
| Race | Petroleum County | MT | USA |
|---|---|---|---|
| White | 99.3% | 84.1% | 58.2% |
| African American | 0.0% | 0.5% | 12.0% |
| American Indian | 0.0% | 5.5% | 0.5% |
| Asian | 0.7% | 0.8% | 5.7% |
| Hawaiian | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.4% | 0.5% |
| Two Or More | 0.0% | 4.3% | 3.9% |
| Hispanic | 0.0% | 4.4% | 19.0% |
1.0% of households in Petroleum County earn Less than $10,000.
4.5% of households in Petroleum County earn $10,000 to $14,999.
10.0% of households in Petroleum County earn $15,000 to $24,999.
9.5% of households in Petroleum County earn $25,000 to $34,999.
19.5% of households in Petroleum County earn $35,000 to $49,999.
19.5% of households in Petroleum County earn $50,000 to $74,999.
5.5% of households in Petroleum County earn $75,000 to $99,999.
20.5% of households in Petroleum County earn $100,000 to $149,999.
4.5% of households in Petroleum County earn $150,000 to $199,999.
5.5% of households in Petroleum County earn $200,000 or more.
| Income | Petroleum County | MT | USA |
|---|---|---|---|
| Less than $10,000 | 1.0% | 4.4% | 4.9% |
| $10,000 to $14,999 | 4.5% | 3.8% | 3.6% |
| $15,000 to $24,999 | 10.0% | 7.5% | 6.6% |
| $25,000 to $34,999 | 9.5% | 8.0% | 6.8% |
| $35,000 to $49,999 | 19.5% | 12.1% | 10.4% |
| $50,000 to $74,999 | 19.5% | 17.8% | 15.7% |
| $75,000 to $99,999 | 5.5% | 13.7% | 12.7% |
| $100,000 to $149,999 | 20.5% | 16.8% | 17.4% |
| $150,000 to $199,999 | 4.5% | 7.7% | 9.3% |
| $200,000 or more | 5.5% | 8.1% | 12.6% |
-1.0% of adults in Petroleum County completed < 9th grade.
1.0% of adults in Petroleum County completed 9-12th grade.
45.0% of adults in Petroleum County completed high school / ged.
24.0% of adults in Petroleum County completed some college.
3.0% of adults in Petroleum County completed associate's degree.
18.0% of adults in Petroleum County completed bachelor's degree.
9.0% of adults in Petroleum County completed master's degree.
0.0% of adults in Petroleum County completed professional degree.
1.0% of adults in Petroleum County completed doctorate degree.
| Education | Petroleum County | MT | USA |
|---|---|---|---|
| < 9th Grade | -1% | 1% | 5% |
| 9-12th Grade | 1% | 4% | 6% |
| High School / GED | 45% | 28% | 26% |
| Some College | 24% | 22% | 19% |
| Associate's Degree | 3% | 10% | 9% |
| Bachelor's Degree | 18% | 23% | 21% |
| Master's Degree | 9% | 8% | 10% |
| Professional Degree | 0% | 2% | 2% |
| Doctorate Degree | 1% | 2% | 2% |
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