Eddyville, the seat of Lyon county, was settled around 1798 and named for the eddies in the nearby Cumberland River. It became the seat of Livingston county when it was formed in 1799, then the seat of Caldwell county in 1809, and finally the seat of Lyon county when it was formed in 1854. The Eddyville post office opened in 1801. The population in 1990 was 1,889.
