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is a city in Washoe County, Nevada, United States. The population was 66,346 at the 2000 census. Although Sparks was originally distinct from Reno, they have both grown toward each other to such a degree that today the border between them is purely political. They are often referred to as a twin city (i.e. "Reno-Sparks").
According to the United States Census Bureau, the city has a total area of 24.0 square miles (62.1 km²), of which, 23.9 square miles (62.0 km²) of it is land and 0.1 square miles (0.2 km²) of it (0.25%) is water.
Stormwater surface runoff from the city drains to the Truckee River, a sensitive hydrological element because it empties into Pyramid Lake, which has no outlet and is the habitat of two endangered species.