History Organized in 1871. County Seat Osborne. The Osborne County Historical Museum is housed in an old depot and an old school on the north edge of town. Plan to spend some time studying the carvings. Special Events in Osborne County Osborne's Fall Festival is the second weekend in September.
Activities range from a black powder shoot and a golf tournament to an art show.
Osborne County Fair is the first week of August each year.