Cavalier County is named for Charles Cavaleer of Pembina ( 1818-1902 ) who was one of the earliest white settlers.
Surrounding County and Canada Courthouses:
N – Manitoba, Canada
E – Pembina County
S – Walsh County and Ramsey County
W – Towner County
Created: January 4, 1873 
County Seat:
Langdon 1884 – present
County Courthouse – Langdon
Location: 901 3rd Street / 9th Avenue
Built: 1957 – 1958
Style: Modern
Architect: Foss and Company
Contractor: The John Larsen Company
Description: The building faces west and is a one story red colored brick, glass and concrete structure. The building is located on landscaped grounds in the center of Langdon. The entrance is located at the south end of west front. The east part of the building is higher in the center section and is faced with polished white colored concrete and green colored concrete on the south side. The roof line is flat. The County District Court courtroom is located along the south side of the building. The building houses the County District Court of the Northeast Judicial District.
See: The architect Foss Associates Architects also designed courthouses in Billings County, Morton County and Ramsey County, and in Minnesota in Becker County, Clay County, Clearwater County and Pennington County.
See: The Norrheast Judicial District includes Benson County, Bottineau County, McHenry County, Pembina County. Pierce County, Ramsey County, Renville County, Rolette County, Towner County and Walsh County.
History: The county was created in 1873 and Langdon was selected as the county seat in 1884 when the county was organized. The first courthouse was built in 1884 at a cost of $360. The second courthouse was a bank in the downtown area. The third courthouse was designed by J W Ross and built in Langdon in 1895 at a cost of $9,099. The fourth and present courthouse was constructed in 1n 1957 to 1958.
County Courthouse – Langdon
County District Court courtroom
Photos taken 2007, 2011 and 2015