Lyon County Courthouse, County courthouse in Yerington, Nevada, United States

The Lyon County Courthouse is a three-story Beaux-Arts building in Yerington, Nevada, with brick walls and terracotta decorations on columns, windows, and doors. The structure spans approximately 90 feet in length and 80 feet in width.

Architect Frederick DeLongchamps designed the building in 1911, and Reno contractor Ward Bros. completed construction in 1912. A western expansion was added in 1936 to provide extra office space for staff.

The building represents early 20th-century public architecture in Nevada and shows how the region designed its government centers. It embodies the compromise between rival towns that both wanted to host the county seat.

The courthouse is located in downtown Yerington and is easy to reach on foot. The building is clearly visible from the street and offers a good view of the town's public architecture.

The courthouse was built because Dayton lost the county seat after a fire destroyed its courthouse and the Comstock Lode declined. Yerington won the contest when mining expanded in Mason Valley, and the new building opened in 1912.