Sibley County, Minnesota: History
The county was created on March 5, 1853. It was named for Henry Hastings Sibley.
The county seat was first established at Henderson. A courthouse was built there and placed into service in 1879. It was used in that capacity until 1915, when the county seat was moved to Gaylord (after Gaylord residents presented a petition to county supervisors). Now the Henderson Community Building, the original courthouse presently houses Henderson City offices.