Sibley Public Library
Carnegie Grant Information
Town & County
Twelfth Census of the United States — 1900. p. 450.
Thirteenth Census of the United States — 1910. 1,330 population.
Sibley is the county seat of Osceola County, which was established on January 15, 1851. The county was named in honor of Osceola (1804-1838), the Seminole Chief. In 1872, the town of Sibley, named for Henry H. Sibley, the first governor of Minnesota, was selected as the county seat.
(Source: Pratt, LeRoy G. “The Counties and Courthouses of Iowa.” Mason City, Ia; Klipto Printing & Office Supply Company, 1977, p. 247.)