The Kenai Peninsula Borough was incorporated in 1964 as a second-class borough under the authority of the State of Alaska Borough Act of 1961. The Borough's governmental responsibilities are comparable to those of a county. The five first-class and home-rule cities in the borough are Kenai, Soldotna, Homer, Seldovia, and Seward. Other locally governed communities include Kachemak City and the native villages of Tyonek, Port Graham, and Nanwalek.