The Nevada City Downtown Historic District is a 16-section of land 6.5 ha historically significant area in Nevada City inside the U.S. territory of California. Situated in Nevada County, it was recorded on the National Register of Historic Places in 1985. It dates from 1917, with cases of Moderne and Italianate engineering. The time of centrality is 1856-1917.
The architecturally significant area covers the downtown segment generally limited by Spring, Bridge, Commercial, York, Washington, Coyote, and Main Streets. It incorporates 70 contributing structures including the National Hotel, which is independently recorded on the National Register. Several verifiable structures have gotten California Historical Landmark status, and have been protected.