Petroleum County, Montana

Petroleum County is a county found in the U.S. state of Montana. As of the 2020 United States Census, 496 people lived there, making it the least populous county in Montana and the eighth-least populous in the United States. Its county seat is Winnett. The county's area was split from Fergus County to become the last of Montana's 56 counties to be organized.Soils Industry, pp. 1-2

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Category:1920s establishments in Montana
Category:1925 establishments in the United States
Category:Montana counties