&&&&&&&&&&022991.&&&&&0 22,991 km 2 ) Defunct counties Edit Bullfrog County formed in 1987 from part of Nye county. Creation declared unconstitutional and abolished in 1989. [1] Lake County one of the original nine counties formed in 1861. Renamed Roop county in 1862. Nevada portions annexed in 1883 to Washoe county, [1] remainder became