500,010 residents live across 38 ZIPs covering 6,149 sq mi, served by 10 distinct USPS-recognized cities.
Population moved from 432,307 to 499,464 from 2014 to 2024 — a +15.5% change. 20 ZIPs gained residents, 5 lost.
The county's wealthiest ZIP 89451 (Incline Village, $166,509 median) and poorest ZIP 89501 (Reno, $33,963) are 20.2 miles apart — a 4.9× income gap across local geography.
Median home values vary 4.2× across this county — from $349,100 in 89433 (Sun Valley) to $1,461,200 in 89451 (Incline Village).
Density varies 6675× across the county — from 1 people/sq mi in 89510 (Reno) to 5,699 in 89501 (Reno).
Educational attainment ranges from 10.5% bachelor's+ in 89433 (Sun Valley) to 65.7% in 89451 (Incline Village) — the breadth of educational profiles across the area.
Within Nevada, this is the #15 most populous of 18 counties and ranks #3 for median household income with the #1 fastest decade growth .
On the national stage, Washoe County is and #5 for decade growth .
Hosts 3 single-entity Unique ZIPs: 89595Grand Sierra Hotel ; 89557Univ Nv Reno ; and 89599Jc Penney Co .
Weighted by population, the typical household earns about $93,118 across the county — reflecting what a typical resident sees, not a simple ZIP average.
34.2% of adults age 25+ hold a bachelor's degree or higher (120,798 of 353,086 reporting). The most-educated ZIPs cluster around Reno.
19 Standard delivery, 16 PO Box only, 3 single-entity Unique ZIPs serve this county.
1 ZIP in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
3 ZIP codes in this county serve a single facility — typically theme parks, universities, large corporations, airports, or government complexes.
Median household income spans 4.9× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.
Washoe County grew 62.0% over the past decade — concentrated in 4 high-growth ZIPs:
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 89436 | Sparks | Standard | 49,544 | $114,100 | 59.4 | 29.6% |
| 89506 | Reno | Standard | 47,046 | $86,396 | 100.1 | 13.6% |
| 89502 | Reno | Standard | 46,691 | $65,328 | 21.1 | 5.5% |
| 89521 | Reno | Standard | 41,859 | $127,181 | 97.2 | 58.4% |
| 89431 | Sparks | Standard | 39,833 | $66,592 | 10.3 | 7.2% |
| 89523 | Reno | Standard | 37,130 | $99,061 | 19.5 | 15.8% |
| 89509 | Reno | Standard | 35,632 | $86,126 | 8.8 | 6.5% |
| 89511 | Reno | Standard | 30,956 | $124,130 | 124.2 | 16.5% |
| 89503 | Reno | Standard | 30,249 | $66,743 | 6.3 | 5.3% |
| 89512 | Reno | Standard | 28,030 | $47,807 | 6.5 | 8.7% |
| 89434 | Sparks | Standard | 27,990 | $91,507 | 170.1 | 10.8% |
| 89433 | Sun Valley | Standard | 23,016 | $75,984 | 10.1 | 17.8% |
| 89508 | Reno | Standard | 14,858 | $97,361 | 180.3 | 29.1% |
| 89441 | Sparks | Standard | 14,460 | $131,616 | 52.2 | 22.9% |
| 89451 | Incline Village | Standard | 9,285 | $166,509 | 45.8 | 10.5% |
| 89519 | Reno | Standard | 9,110 | $155,288 | 8.6 | 9.8% |
| 89704 | Washoe Valley | Standard | 4,846 | $118,017 | 83.1 | 3.7% |
| 89501 | Reno | Standard | 3,507 | $33,963 | 0.6 | -4.5% |
| 89439 | Cross State | PO Box | 2,532 | $101,250 | 35.7 | 62.0% |
| 89510 | Reno | Standard | 1,457 | $100,282 | 1,706.6 | -16.3% |
| 89442 | Wadsworth | PO Box | 808 | $64,444 | 97.5 | -27.9% |
| 89557 | Reno | Unique | 546 | — | 0.0 | — |
| 89424 | Nixon | PO Box | 370 | $72,585 | 142.0 | 41.8% |
| 89412 | Gerlach | PO Box | 137 | — | 3,144.7 | -39.6% |
| 89402 | Crystal Bay | PO Box | 118 | — | 18.0 | — |
| 89450 | Incline Village | PO Box | 0 | — | 0.0 | -100.0% |
| 89570 | Reno | PO Box | — | — | 0.0 | — |
| 89520 | Reno | PO Box | — | — | 0.0 | — |
| 89599 | Reno | Unique | — | — | 0.0 | — |
| 89515 | Reno | PO Box | — | — | 0.0 | — |
| 89533 | Reno | PO Box | — | — | 0.0 | — |
| 89513 | Reno | PO Box | — | — | 0.0 | — |
| 89432 | Sparks | PO Box | — | — | 0.0 | — |
| 89595 | Reno | Unique | — | — | 0.1 | — |
| 89504 | Reno | PO Box | — | — | 0.0 | — |
| 89505 | Reno | PO Box | — | — | 0.0 | — |
| 89507 | Reno | PO Box | — | — | 0.0 | — |
| 89435 | Sparks | PO Box | — | — | 0.0 | — |