The Coffeyville Oil Field is located in southeastern Kansas, primarily in Montgomery County. Discovered in the early 1900s, it became one of the significant oil-producing areas in the region. The field is known for its rich deposits of crude oil, which have contributed to the local economy and energy supply. Over the years, the Coffeyville Oil Field has undergone various phases of development and production. It is part of the larger Mid-Continent Oil Province, which includes other notable fields. The field's history reflects the broader trends in the American oil industry, including technological advancements and shifts in energy demand.