Reno is the county seat of Washoe County, Nevada, United States. The city has a population of 217,999 (approx) and is the fourth most populous city in Nevada. Reno sits in a high desert valley at the foot of the Sierra Nevada. Reno borders Sparks, a city with approximately 90,000. Most call the metro area the "Truckee Meadows" and it has a population of about 310,000.