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ZIP codes in Washoe County

42 ZIPs touch Washoe County, Nevada. The blue dashed line is the county border; orange ZIPs reach into it.

42

ZIP codes

6

cross the county line

510,748

people in these ZIPs

17

counties in NV

Most people

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Washoe County ZIP list

More counties in Nevada

All 17 counties in Nevada

Questions people actually ask

How many ZIP codes are in Washoe County, Nevada?

42 ZIP codes reach into Washoe County, including 14 PO Box or single-address ZIPs placed by the town they serve. 6 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Washoe County has the most people?

89436 (Sparks) has about 49,544 residents, the most of any ZIP touching Washoe County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Washoe County and another county?

Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in Washoe County. For one address, pin the exact spot on the ZIP finder to see its county.

Where does this list come from?

ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.

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Updated 2026-11-10 · Where the data comes from