Rolette County, North Dakota: History
The Dakota Territory legislature created the county on January 4, 1873, with territory partitioned from Buffalo County. It was not organized at that date, and was not attached to another county for judicial or administrative purposes. It was named for Joseph Rolette Jr., a fur trader and political figure from Pembina. The county government was effected on October 14, 1884, with Dunseith as the county seat. In 1885 the county seat was assigned to Saint John, and in 1889 it was assigned to Rolla.
The county boundaries were adjusted in 1883 and in 1887. It has retained its present boundary configuration since 1887.
The International Peace Garden is located in the northwest corner of the county along the Canada–United States border with Manitoba.