Petroleum County Demographics

A map of Petroleum County's Population by Race

Petroleum County, Montana had a population of 496 in 2020. It was 94.0% White, 0.0% Black, 0.0% Asian, 1.0% Hispanic, 0.0% Native American/Other, and 5.0% Multiracial. This map presents the population of Petroleum County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Petroleum County is the 56th most populous county of the 56 counties in Montana.

Petroleum County's White Population

466 residents of Petroleum County identify as White, or 94.0%. This makes the White share of the population of Petroleum County slightly larger than the White share of the population of Montana (83.1% White). Of the 56 counties in Montana, Petroleum County is ranked #4 in terms of White residents as a share of the population.

Petroleum County is more White than neighboring Musselshell County (90.4% White), Fergus County (92.3% White), Yellowstone County (82.9% White), Golden Valley County (88% White), and Phillips County (82.8% White).

Petroleum County's Black Population

0 residents of Petroleum County identify as Black, or 0.0%. This makes the Black share of the population of Petroleum County roughly similar to the Black share of the population of Montana (0.5% Black). Of the 56 counties in Montana, Petroleum County is ranked #52 in terms of Black residents as a share of the population.

Petroleum County is less Black than neighboring Musselshell County (0.1% Black), Fergus County (0.2% Black), Yellowstone County (0.7% Black), Golden Valley County (0.9% Black), and Phillips County (0.1% Black).

Petroleum County's Asian Population

0 residents of Petroleum County identify as Asian, or 0.0%. This makes the Asian share of the population of Petroleum County roughly similar to the Asian share of the population of Montana (0.7% Asian). Of the 56 counties in Montana, Petroleum County is ranked #54 in terms of Asian residents as a share of the population.

Petroleum County is less Asian than neighboring Musselshell County (0.5% Asian), Fergus County (0.3% Asian), Yellowstone County (0.8% Asian), and Phillips County (0.4% Asian).

Petroleum County's Hispanic Population

5 residents of Petroleum County identify as Hispanic, or 1.0%. This makes the Hispanic share of the population of Petroleum County roughly similar to the Hispanic share of the population of Montana (4.2% Hispanic). Of the 56 counties in Montana, Petroleum County is ranked #54 in terms of Hispanic residents as a share of the population.

Petroleum County is less Hispanic than neighboring Musselshell County (3.1% Hispanic), Fergus County (2% Hispanic), Yellowstone County (6.1% Hispanic), Golden Valley County (4.3% Hispanic), and Phillips County (2.7% Hispanic).

Petroleum County's Native American/Other Population

0 residents of Petroleum County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.0%. This makes the Native American/Other share of the population of Petroleum County slightly less than the Native American/Other share of the population of Montana (6.4% Native American/Other). Of the 56 counties in Montana, Petroleum County is ranked #56 in terms of Native American/Other residents as a share of the population.

Petroleum County is less Native American/Other than neighboring Musselshell County (2.2% Native American/Other), Fergus County (1.4% Native American/Other), Yellowstone County (4.5% Native American/Other), Golden Valley County (1.6% Native American/Other), and Phillips County (8.4% Native American/Other).

Petroleum County's Multiracial Population

25 residents of Petroleum County identify as Multiracial, or 5.0%. This makes the Multiracial share of the population of Petroleum County roughly similar to the Multiracial share of the population of Montana (5% Multiracial). Of the 56 counties in Montana, Petroleum County is ranked #16 in terms of Multiracial residents as a share of the population.

Petroleum County is more Multiracial than neighboring Musselshell County (3.8% Multiracial), and Fergus County (3.8% Multiracial). Petroleum County is less Multiracial than neighboring Golden Valley County (5.3% Multiracial), and Phillips County (5.6% Multiracial).

Source: 2020 Census State Redistricting Data and Census TIGER/Line Shapefiles.