Logan County is a county located in the U.S. state of Kansas. Its county seat and largest city is Oakley. As of the 2020 census, the county population was 2,762. The county was named for John Logan, a general during the American Civil War. One of the county's distinctive features is a mile-long stretch of Smoky Hill Chalk bluffs that tower 100 feet (30 m) high over the Smoky Hill River and are dubbed "Little Jerusalem" for resemblance to the ancient walled city. The formation is mostly on private land. In 2016, The Nature Conservancy purchased the property and the Little Jerusalem Badlands State Park opened to the public in October 2019.

Oakley is a city in Gove, Logan, and Thomas counties in the U.S. state of Kansas. It is the county seat of Logan County. As of the 2020 census, the population of the city was 2,046.