Yerington is a city in Lyon County, Nevada, United States. The population was 3,048 at the 2010 census. It is the current county seat of Lyon County, with the first county seat having been established at Dayton on November 29, 1861. It is named after Henry M. Yerington, superintendent of the Virginia and Truckee Railroad from 1868 to 1910.

Lyon County is a county in the U.S. state of Nevada. As of the 2020 census, the population was 59,235. Lyon County comprises the Fernley, NV Micropolitan Statistical Area which is part of the Reno-Carson City-Fernley, NV Combined Statistical Area.