Washoe County, Nevada

Washoe County is a county in Nevada, United States, anchored by Reno and Sparks in the high desert basin along the eastern slope of the Sierra Nevada. It had a population of 486,492 at the 2020 census, making it Nevada’s second-most populous county after Clark. The county covers 6,542 square miles (16,940 km2), of which 6,302 square miles are land and 240 square miles are water, centred near 40°38′N 119°41′W.

Reno is the county seat, and its postal code is 89501. Washoe County has two incorporated cities (Reno and Sparks), several census-designated places, and a scatter of unincorporated desert communities across its northern reaches. It sits in the Pacific time zone and carries FIPS code 32031.

Towns & Villages in Washoe County

Most of the county’s population lives in the Reno-Sparks urban area at the southern end; the rest is sparsely settled ranching and recreation country stretching north to the Oregon line.

Nevada does not organize counties into civil townships, so Washoe’s remaining places — Deep Hole, Flanigan, Galena, Poeville, Pleasant Valley, Steamboat Springs and Vya among them — are unincorporated ranching or recreation outposts with no separate government and no independently verified ZIP of their own.

ZIP Codes

Reno’s core postal codes run 89501–89513, 89515, 89519–89521, 89523, 89533, 89555, 89557, 89570, 89595 and 89599, covering downtown, the university district and the surrounding Truckee River corridor. ZIP codes for Sparks and the county’s smaller CDPs and unincorporated communities were not independently verified for this profile and are omitted rather than guessed; readers can confirm a specific address at USPS.com.

Geography

Washoe County spans the transition from the forested Sierra Nevada crest at its southwest corner to open sagebrush basin-and-range country in the north. The Truckee River flows out of Lake Tahoe through Reno and Sparks before terminating at Pyramid Lake. The Black Rock Desert, a dry lakebed used for land-speed records and the annual Burning Man gathering, occupies the county’s remote north.

Washoe County borders, in Nevada: Humboldt County to the northeast, Pershing County to the east, Churchill County to the southeast, Lyon County and Storey County to the south. Across the state line it borders, in California, Lassen, Sierra, Nevada and Placer counties to the west and southwest; and Lake County, Oregon, to the north.

Demographics

Washoe County had 486,492 residents at the 2020 census; the Reno-Sparks metro area has continued to grow since, driven by logistics, tech-manufacturing and remote-work relocation from California. Reno and Sparks together hold roughly three-quarters of the county’s population. Nevada’s statewide 2023 ACS median household income was $76,364; Washoe, anchored by Reno’s diversified economy, tracks close to that figure, though a county-specific 2023 estimate was not independently verified for this profile. Away from the Reno-Sparks urban core, population density drops sharply across the county’s ranching and desert north.

Economy & Local Life

Reno’s economy has shifted from a gaming-and-tourism base toward logistics, data centers and advanced manufacturing, anchored by the Tahoe-Reno Industrial Center east of Sparks, home to Tesla’s Gigafactory Nevada, Switch, and Panasonic operations. The University of Nevada, Reno and Renown Health are major employers in the city itself, alongside the casino resorts along the Truckee River. Rural Washoe County supports cattle ranching, alfalfa farming and outdoor recreation tied to Pyramid Lake and the Sierra foothills. The county’s biggest annual event is Burning Man, held over Labor Day week in the Black Rock Desert and drawing tens of thousands of visitors from around the world.

History

Washoe County was created on November 25, 1861, as one of the nine original counties of the Nevada Territory, two years ahead of Nevada statehood. It takes its name from the Washoe people, whose traditional homeland centred on the Lake Tahoe basin and the Truckee and Carson river valleys. Reno grew from a Truckee River crossing point served by the Central Pacific Railroad’s transcontinental line, completed in 1868, and became the county seat soon after. The county’s north end, including the Pyramid Lake Paiute Reservation around Nixon and Wadsworth, preserves a much older Indigenous presence than the mining- and rail-era towns to the south.

Getting There

Interstate 80 runs east-west through Reno and Sparks, linking the county to Sacramento and the San Francisco Bay Area to the west and Salt Lake City to the east. U.S. Route 395 runs north-south along the county’s spine, and State Route 445/446 leads north to Pyramid Lake.

• Carson City — 30 miles south
• Truckee, California — 35 miles west
• Lovelock — 90 miles east
• Susanville, California — 85 miles northwest

Reno-Tahoe International Airport, just southeast of downtown Reno, is the region’s commercial air hub. Amtrak’s California Zephyr calls at the Reno station on its Chicago-to-Emeryville route.

Frequently Asked Questions

What county is Reno, Nevada in?
Reno is the county seat of Washoe County, Nevada.

What is the Reno postcode?
Reno’s main ZIP code is 89501, with several additional ZIPs covering the wider city.

How many people live in Washoe County?
Washoe County had a population of 486,492 at the 2020 census.

How big is Washoe County?
The county covers 6,542 square miles (16,940 km2), most of it land, in the state’s northwest corner.

What counties border Washoe County?
In Nevada: Humboldt, Pershing, Churchill, Lyon and Storey counties. It also borders four California counties and Lake County, Oregon.

What is Washoe County’s biggest city?
Reno is the largest city and the county seat, followed by Sparks.

When was Washoe County created?
Washoe County was created on November 25, 1861, as one of the original nine counties of the Nevada Territory.

More counties in this state: Towns and villages in Nevada.