Montana Petroleum County Public Libraries

By | December 31, 2022

We are providing a comprehensive directory of public libraries in Petroleum County, Montana. This list includes library formal name, street address, postal code, phone number and how many books are available. Check the following list to see all public libraries in Montana Petroleum County.

  • BESTITUDE.COM: Geography of Montana state, including climate, rivers, lakes, and agriculture.

Street Address: 205 South Broadway, Winnett, MT 59087
Phone Number: (406) 429-2451 Petroleum 9,835 9,412

Street Address: 205 South Broadway, Winnett, MT 59087
Phone Number: (406) 429-2451 Petroleum N/A N/A

Overview of Petroleum County, Montana

Petroleum County is a county located in the state of Montana. As of 2000, the population is 493, making it Montana’s least populated county. Its county seat is Winnett.


According to the U.S. Census Bureau, the county has a total area of 4,336 km² (1,674 mi²). 4,284 km² (1,654 mi²) of it is land and 52 km² (20 mi²) of it is water. The total area is 1.20% water.


As of the census of 2000, there are 493 people, 211 households, and 136 families residing in the county. The population density is 0/km² (0/mi²). There are 292 housing units at an average density of 0/km² (0/mi²). The racial makeup of the county is 99.19% White, 0.20% Native American, 0.20% from other races, and 0.41% from two or more races. 1.22% of the population are Hispanic or Latino of any race.

There are 211 households out of which 31.30% have children under the age of 18 living with them, 55.90% are married couples living together, 5.70% have a female householder with no husband present, and 35.10% are non-families. 31.30% of all households are made up of individuals and 17.50% have someone living alone who is 65 years of age or older. The average household size is 2.34 and the average family size is 2.95.

In the county the population is spread out with 26.00% under the age of 18, 6.10% from 18 to 24, 22.70% from 25 to 44, 28.20% from 45 to 64, and 17.00% who are 65 years of age or older. The median age is 41 years. For every 100 females there are 110.70 males. For every 100 females age 18 and over, there are 111.00 males.

The median income for a household in the county is $24,107, and the median income for a family is $32,667. Males have a median income of $20,694 versus $17,188 for females. The per capita income for the county is $15,986. 23.20% of the population and 21.00% of families are below the poverty line. Out of the total population, 25.60% of those under the age of 18 and 17.30% of those 65 and older are living below the poverty line.

Cities and towns

According to countryaah, Petroleum County, Montana has the following cities and towns:

  • Winnett