Kaimana Regency is a regency in the south of West Papua province of Indonesia. It covers an area of 18,500 sq. km, and had a population of 46,249 at the 2010 Census and 62,256 at the 2020 Census; the official estimate as at mid 2023 was 65,490. The administrative centre is the town of Kaimana. The Mairasi languages are spoken in the regency, among other languages.