Petroleum County, Montana Genealogy Guide

Petroleum County, Montana (Map It) was created on November 24, 1924 from Fergus County. The county was named for the production of petroleum at Cat Creek. Learn More About State of Montana History

Petroleum County is bordered by Phillips County (north), Garfield County (east), Rosebud County (south), Musselshell County (south), Fergus County (west).

Petroleum County Cities and Towns include Winnett. A Map of Petroleum County, Montana contains detailed information about roads and boundaries, these maps may include rural communities, churches, and cemeteries.

Petroleum County, Montana Courthouse Records

Petroleum County, Montana Courthouse
Petroleum County, MT Courthouse

The Petroleum County Courthouse is located in Winnett, Montana. Learn More About State of Montana Court, Tax, Land and Probate Records.

Please contact the each clerk's department to confirm mailing address, hours, fees and other information before visiting or requesting information because contact information sometimes changes.  The Clerk's Office DOES NOT DO RESEARCH.  The documents are available to interested parties, barring confidential issues.  Most staff will assist people in finding the materials, but it is up to the individual to do the research.

The following dates indicates what vital, land, probate, and court records are in Petroleum county. The date listed for each category of record is usually the earliest registration filed. The earliest date does not indicate that there are numerous records for that year and does not mean that all such events were actually registered.

  • Petroleum County Clerk and Recorder has Birth / Death Records from 1916 and Land Records from 1925. The County Clerk and Recorder responsibilities include but are not limited to, recording and maintaining the majority of all the legal documents relating to real estate records, land descriptions, plats and surveys, county birth and death records and the records of the Board of County commissioners.
  • Petroleum County Clerk of District Court has Marriage / Divorce Records from 1925, Probate Records from 1925 and Court Records from 1925. The County Clerk of District Court is responsible for all District Court records. These records include Adoption, Civil, Criminal, Dependent Neglect, Domestic Relations, Guardianship, Juvenile, Paternity, Probate and Sanity cases. The clerk also issues, files and records all Madison County Marriage license applications and license.

Petroleum County, Montana Census Records

  • Learn More: State of Montana Census Records
  • U.S. Federal Population Schedules: 1930, 1940
  • U.S. Indian Census Records: 1885-1940
  • State Population Schedules: None
  • U.S. Federal Census Mortality Schedules: None
  • Selected U.S. Federal Census Agriculture Schedules: None
  • Selected U.S. Federal Census Industry Schedules: None
  • Union Veterans Schedules: None

Petroleum County, Montana Vital Records

Petroleum County, Montana Resources

Petroleum County, Montana External Links