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The total population of Petroleum County is estimated to be 416 with 226 males (54.33%) and 190 females (45.67%). There are 36 less females than males in Petroleum County.
The median household income in Petroleum County was $58,775 in 2021, which marked an an increase of 13,449(29.67%) from $45,326 in 2020. This income is 78.78% of the U.S. median household income of $74,606 (all incomes in 2022 inflation-adjusted dollars).
Per the latest American Community Survey by the Census Bureau, Petroleum County sees its highest median household income among householders in the age group of 45 to 64 years old, at $106,064. Overall, the median household income for the county of Petroleum County stands at $58,775.
In Petroleum County, the median income for all workers aged 15 years and older, regardless of work hours, was $36,867 for males and $29,339 for females. However, when specifically considering full-time, year-round workers within the same age group, the median income was $54,496 for males and $52,019 for females.
In Petroleum County, population is primarily represented by White households, reporting a median income of $55,622.
In 2022, the population of Petroleum County was 524, a 0.38% increase year-by-year from 2021. Previously, in 2021, Petroleum County's population was 522, an increase of 4.40% compared to a population of 500 in 2020.
The median age in Petroleum County, MT is 50.0, as per 2021 ACS 5-Year Estimates. Of the total population, 16.59% were under the age of 15, 9.91% aged 15 to 29, 52.53% aged 30 to 64, 19.82% aged 65 to 84, and 1.15% were 85 years of age and older.
Racial distribution of Petroleum County population: 94.01% are White and 5.99% are Asian.