Residential delivery area · Washington
ZIP Code 99170: Rosalia, WA
ZIP code 99170 uses the postal name Rosalia, Washington and lies mostly in Whitman County (57% of its land) with the rest in Spokane County (Census 2020 ZIP-county file). About 930 people live there (Census Bureau, ACS 2020-2024). Median household income is $58,750 (Census Bureau, ACS 2020-2024). By Census place, under 1% of its land lies in Rosalia; more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2022
- ZBP2023
- IRS2022
- Town
- Rosalia · its only residential ZIP
- County
- Whitman County (57%); Spokane County (43%)
- Census places
- Rosalia
- Micro area
- Pullman, WA
- House district
- WA-5 119th Congress
- State
- Washington
- Time zone
- Pacific
- Land area
- 173.1 sq mi · 5 people per sq mi
Where is ZIP code 99170?
99170 centers on 47.253°, -117.397° and covers 173.1 square miles of land plus 0.3 of water. It borders 8 ZIP codes: 99149, 99158, 99176, 99031, 99018, 99012, 99004, 99171.
The map draws ZIP code areas only. For the streets inside 99170, 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 99170 compare with the rest of Whitman County?
| Measure | 99170 | In Whitman County | In WA |
|---|---|---|---|
| People (ACS 2020-2024) | 926 | 6th of 22 | 431st of 605 |
| Median household income | $59k | not ranked | not ranked |
| Median home value | $238k | not ranked | not ranked |
99170's income and home value are not ranked: it has fewer than 1,000 residents (926). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 11% of 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 99170?
The 2020 Census counted 1,135 people in 99170; the ACS, which samples households over 2020-2024, estimates 926. Between the 2010 and 2020 censuses its population grew 5.9% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 926±168 (90% margin)
- 2020 Census count
- 1,135+5.9% since 2010 (1,072)
- Households
- 423
- Median age
- 50.5
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 99170?
Of the 926 people the ACS estimates in 99170, 24.2% are under 18 and 22.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (84.7%).
- Under 1824.2%
- 18 to 6453.5%
- 65 and older22.4%
- White, not Hispanic84.7%
- Other or two or more8.5%
- Hispanic or Latino5.8%
- Black, not Hispanic1.0%
- 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 99170 earn?
Median household income is $58,750 (ACS 2020-2024). It is not measurably different from 2015-2019 ($63,687 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $58,750±$15,557
- Income per person
- $35,231
- Below the poverty line
- 12.3%
- Unemployed (of the labor force)
- 6.1%
- Adults 25+ with a bachelor's degree
- 17.8%
- Adjusted gross income per tax return, 2022
- $75,300470 returns; wages 62% 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 99170?
- Median home value (owners' estimate)
- $238,300
- Median gross rent
- $825
- Homes owned by their occupants
- 83.9%
- Housing units
- 487
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 99170?
23 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).
- Construction5
- Wholesale trade5
- Retail trade3
- 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 99170?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 99149 | Malden | 100 | $26k | 3.8 mi |
| 99158 | Oakesdale | 561 | $78k | 11.1 mi |
| 99176 | Thornton | 163 | $128k | 11.1 mi |
| 99031 | Spangle | 1,251 | $98k | 11.6 mi |
| 99018 | Latah | 272 | $53k | 11.8 mi |
| 99012 | Fairfield | 1,167 | $89k | 13.1 mi |
| 99004 | Cheney | 22,871 | $67k | 14.9 mi |
| 99171 | Saint John | 895 | $53k | 16.1 mi |
| 99039 | Waverly | 166 | $66k | 9.8 mi (near) |
| 99033 | Tekoa | 832 | $59k | 14.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.