Population
Petroleum County has a population of 554 as of 2023. It is located in Montana.
Demographics
The following demographic data represents the racial and ethnic composition of Petroleum County based on the most recent Census Bureau estimates.
Race & Ethnicity
Race & Ethnicity Breakdown
| Race/Ethnicity | Percentage | Population |
|---|---|---|
| White | 98.1% | 543 |
| Asian | 1.9% | 11 |
| Black or African American | 0.0% | 0 |
| American Indian/Alaska Native | 0.0% | 0 |
| Native Hawaiian/Pacific Islander | 0.0% | 0 |
| Some Other Race | 0.0% | 0 |
| Two or More Races | 0.0% | 0 |
| Hispanic or Latino | 0.0% | 0 |
Marital Status (Age 15+)
Economics & Income
Economic indicators and income statistics for Petroleum County based on American Community Survey 5-Year Estimates.
Income & Poverty
| Type | Median Income | Mean Income |
|---|---|---|
| Households | $57,981 | $69,949 |
| Families | $77,500 | $85,177 |
| Married-couple Families | $77,500 | $86,800 |
| Nonfamily Households | $24,821 | $26,807 |
Sources
All data presented on this page is sourced from official U.S. government sources and is accurate as of 2023. Data is updated annually when new estimates become available.
Population, demographics, income, poverty, and age data for Petroleum County, Montana.
Annual population estimates for counties.
Official population counts and demographic data from the decennial census.
Data Methodology
The statistics shown are estimates from the American Community Survey (ACS) and Population Estimates Program. Margins of error apply but are not shown. For the most current and detailed data, please visit the U.S. Census Bureau website.