In 2019, Petroleum County, MT had a population of 453 people with a median age of 51.8 and a median household income of $51,250. Between 2018 and 2019 the population of Petroleum County, MT grew from 432 to 453, a 4.86% increase and its median household income grew from $44,688 to $51,250, a 14.7% increase.
The 5 largest ethnic groups in Petroleum County, MT are White (Non-Hispanic) (94.5%), Asian (Non-Hispanic) (5.52%), White (Hispanic) (0%), Black or African American (Non-Hispanic) (0%), and Black or African American (Hispanic) (0%). 0% of the households in Petroleum County, MT speak a non-English language at home as their primary language.
100% of the residents in Petroleum County, MT are U.S. citizens.
In 2019, the median property value in Petroleum County, MT was $181,300, and the homeownership rate was 74.5%. Most people in Petroleum County, MT drove alone to work, and the average commute time was 8.03 minutes. The average car ownership in Petroleum County, MT was 2 cars per household.
Petroleum County, MT borders Fergus County, MT, Garfield County, MT, Musselshell County, MT, Phillips County, MT, and Rosebud County, MT.