The county of Petroleum is located in Montana and was founded in 1925. There are 475 residents in Petroleum who have access to courthouses in Winnett. In general, each county has a full set of courts, from traffic court to superior and appellate court; supreme courts are usually located in the state capital. Montana is part of the 9th federal circuit court as well.
There are 182 residents in Winnett, which is 1.0 square miles and 2,953ft above sea level.