Petroleum County is located in central Montana. The County Seat is Winnett and the largest city is Winnett. The Official Web Site is located at http://petroleumcountymt.org/. The 2014 population estimate is 485 and the 2010 census population was 494. The land area is 1,654.87 square miles and there are 0.3 persons per square mile.
98.4% of the population is White, 0% is Black or African American, 1% is Hispanic or Latino, 0% is Asian, 0.6% is American Indian or Alaska Native, 0% is Native Hawaiian or Pacific Islander, and 1% is two or more races. 96% have a high school degree or higher, and 15.4% have a Bachelor degree or higher.
The median home value is $83,200, there are 233 households, an average of 2.31 persons per household. The per capita income is $22,714, the median household income is $41,705, and 11.1% of the persons in Petroleum County are considered below poverty level.
The total number of firms, at last estimate, was unavailable. Retail sales (in $1000) were unavailable, and sales per capita were unavailable.
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