Linn Creek is a city in Camden County, Missouri, United States. The population was 216 at the 2020 census. The original Linn Creek, which was the former county seat of Camden County, Missouri, is now under water, in the Lake of the Ozarks. Construction of the Bagnell Dam that created the lake was begun August 8, 1929. The county seat was moved to the new town of Camdenton which had its beginnings in 1931.