🇺🇸 Petroleum County, United States

Petroleum County is located in the state of Montana, United States. With a population of just over 400 people, it is one of the least populated counties in the state. Being an inland county, it does not have any ports or shipyards. However, it may be of interest to seafarers or shipowners as the county is known for its oil and gas industry, with numerous oil wells and exploration activities taking place in the area.