Logan County, North Dakota: History
The Dakota Territory legislature created the county on January 4, 1873. It was named for John A. Logan (1826–1886), a Civil War general and United States Senator from Illinois. The county government was not organized at that time, but the county was not attached to another county for administrative or judicial purposes. The county government organization was established on September 1, 1884.
The county's boundaries were altered in 1883. They have remained in the present configuration since that time. Napoleon was the county seat from 1884 to 1899. King briefly became the county seat in 1899 before Napoleon was once again given that title.