Petroleum County MT Information


Petroleum County Subdivisions

Petroleum County MT Data & Demographics (As of July 1, 2017)


Total Population 476
Daytime Population: Workers 323
Daytime Population: Residents 231
Total Daytime Population (TDP) 554
Ratio TDP/Total Population1 1.16
Population in Households 476
Population in Familes 384
Population in Group Qrtrs 0
Population Density2 0
Diversity Index3 5


Median Household Income $41,517
Average Household Income $55,816
Per Capita Income $25,446


Total Housing Units 326 (100%)
Owner Occupied HU 154 (47.2%)
Renter Occupied HU 63 (19.3%)
Vacant Housing Units 109 (33.4%)
Median Home Value $108,824
Average Home Value $284,091


Total Households 217
Average Household Size 2.19
Family Households 135
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population -0.51% -0.64%
Households -0.5% -0.65%
Families -0.79% -0.91%
Median Household Income   1.71%
Per Capita Income   3.12%


Petroleum County MT - Peer Comparisons by Rank and Percentile

The table below compares Petroleum County to the other 56 counties and county equivalents in Montana by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 56 2nd
Population Density # 56 4th
Diversity Index # 55 4th
Median Household Income # 39 32nd
Per Capita Income # 38 34th

Additional comparisons and rankings can be made with a VERY EASY TO USE Montana Census Data Comparison Tool.