Residential delivery area · Washington
ZIP Code 99110: Clayton, WA
ZIP code 99110 uses the postal name Clayton, Washington and lies mostly in Stevens County (93% of its land) with the rest in Spokane County (Census 2020 ZIP-county file). About 1,500 people live there (Census Bureau, ACS 2020-2024). Median household income is $76,106 (Census Bureau, ACS 2020-2024). By Census place, 3% of its land lies in Clayton (a census-designated place); 97% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2022
- ZBP2023
- IRS2022
- Town
- Clayton · its only residential ZIP
- County
- Stevens County (93%); Spokane County (7%)
- Census places
- Clayton census-designated place
- Metro area
- Spokane-Spokane Valley, WA
- House district
- WA-5 119th Congress
- State
- Washington
- Time zone
- Pacific
- Land area
- 38.6 sq mi · 39 people per sq mi
Where is ZIP code 99110?
99110 centers on 48.008°, -117.581° and covers 38.6 square miles of land. It borders 3 ZIP codes: 99006, 99148, 99173.
The map draws ZIP code areas only. For the streets inside 99110, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 99110 compare with the rest of Stevens County?
| Measure | 99110 | In Stevens County | In WA |
|---|---|---|---|
| People (ACS 2020-2024) | 1,505 | 12th of 21 | 389th of 605 |
| Median household income | $76k | 3rd of 9 | 264th of 363 |
| Median home value | $453k | 2nd of 11 | 235th of 392 |
Its median household income is higher than in 57% of U.S. residential ZIP codes, and it is denser than 37% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 99110?
The 2020 Census counted 1,853 people in 99110; the ACS, which samples households over 2020-2024, estimates 1,505. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 1,505±368 (90% margin)
- 2020 Census count
- 1,853
- Households
- 573
- Median age
- 32.4
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 99110?
Of the 1,505 people the ACS estimates in 99110, 26.0% are under 18 and 17.9% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (91.0%).
- Under 1826.0%
- 18 to 6456.1%
- 65 and older17.9%
- White, not Hispanic91.0%
- Other or two or more8.0%
- Hispanic or Latino1.0%
- Black, not Hispanic0.0%
- Asian, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 99110 earn?
Median household income is $76,106 (ACS 2020-2024), the 3rd highest of the 9 ranked ZIP codes in Stevens County.
- Median household income
- $76,106±$8,331
- Income per person
- $34,834
- Below the poverty line
- 2.3%
- Unemployed (of the labor force)
- 0.0%
- Adults 25+ with a bachelor's degree
- 22.5%
- Adjusted gross income per tax return, 2022
- $72,484770 returns; wages 64% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 99110?
- Median home value (owners' estimate)
- $453,100
- Median gross rent
- $954
- Homes owned by their occupants
- 81.5%
- Housing units
- 601
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 99110?
35 business establishments had a location in this ZIP code in 2023, 4 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction8
- Administrative and support and waste management and remediation services5
- Agriculture, forestry, fishing and hunting4
- Professional, scientific, and technical services4
- Other services (except public administration)3
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 99110?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 99006 | Deer Park | 16,177 | $72k | 5.2 mi |
| 99148 | Loon Lake | 2,794 | $67k | 6.9 mi |
| 99173 | Springdale | 1,623 | $60k | 13.0 mi |
| 99034 | Tumtum | 198 | – | 11.9 mi (near) |
| 99181 | Valley | 1,995 | $64k | 12.7 mi (near) |
| 99026 | Nine Mile Falls | 9,320 | $101k | 14.5 mi (near) |
| 99013 | Ford | 1,620 | $50k | 14.7 mi (near) |
| 99005 | Colbert | 10,815 | $126k | 15.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.