Harlan was platted in 1858. It was named for one of Iowa’s early U.S. Senators, James Harlan. Harlan was designated county seat in 1859. The town was incorporated on May 2, 1879.
Public schools in Harlan are governed and operated by the Harlan Community School District. The school district also serves residents of Jacksonville, Corley, Defiance, Panama, Portsmouth, Earling, and Westphalia. As of November 2021, the district has a student enrollment of 1,450. The district’s racial demographics are 91.4% White, 5.7% Hispanic, 0.8% African American, and 2% non-white of other minorities.