Jim Lane's Fort, sometimes called Fort Jim Lane, was built in August 1856, in Holton, Kansas, United States. It was named to honor free-state leader James H. Lane, who helped organize the settlement of several towns in northeast Kansas Territory, including Holton. Holton was settled by about fifty free-state settlers at the time the fort was built. The fort, built to serve as a place of refuge for the townspeople, was built of logs. It measured 20 feet (6.1 m) by 30 feet (9.1 m).