Petroleum County, Montana Facts
| Facts | |
| State | Montana |
| Land area | 1,654.9 square miles |
| Population Density | 0.3 persons per square mile. |
| Population | |
| Population (2013) | 506 |
| Population change | 2.4% | Under 5 years of age | 4% |
| Under 18 | 23.7% |
| 65 and over | 20% |
| Females | 46.6% |
| White | 98.4 |
| Hispanic or Latino of any race | 1 |
| Asian | 0% |
| Two or more races | 1% |
| Black or African American | 0% |
| Native American | 0.6% |
| Pacific Islander | 0% |
| Had graduated from high school | 96% |
| Had a bachelor’s degree or higher | 15.4% |
| Veterans | 70 |
| Households and Housing | |
| Households | 233 |
| Persons per household | 2.3 |
| Living in the same house for one year or more | 89% |
| Median household income | $41,705 |
| The per capita income | $22,714 |
| Live below the poverty line. | 11.1% |
| housing units | 327 |
| Multi-unit structures | 3% |
| The median value of owner-occupied housing | $83,200 |
| Residents owning their homes. | 76% |
| Business Facts | |
| Total number of firms | 0 |
| Women-owned firms | 0% |
| Asian-owned firms | 0% |
| Hispanic-owned firms | 0% |
| Black-owned firms | 0% |
| Native American-owned firms | 0% |
| Pacific Islander-owned firms | 0% |
| Retail sales | $0 |
| Retail sales per capita | $0 |
| Manufacturers shipments | $0 |
| Merchant wholesaler sales | $0 |