Residential delivery area · Washington
ZIP Code 98851: Soap Lake, WA
ZIP code 98851 uses the postal name Soap Lake, Washington and lies entirely in Grant County (Census 2020 ZIP-county file). About 4,400 people live there (Census Bureau, ACS 2020-2024). Median household income is $63,333 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Soap Lake (1%) and Lakeview (under 1%); 98% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Soap Lake · its only residential ZIP
- County
- Grant County
- Census places
- Soap Lake (1%); Lakeview (under 1%) census-designated place
- Micro area
- Moses Lake, WA
- House district
- WA-4 119th Congress
- State
- Washington
- Time zone
- Pacific
- Land area
- 146.1 sq mi · 30 people per sq mi
Where is ZIP code 98851?
98851 centers on 47.414°, -119.432° and covers 146.1 square miles of land plus 4.4 of water. It borders 4 ZIP codes: 98853, 98823, 99115, 98837.
The map draws ZIP code areas only. For the streets inside 98851, 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 98851 compare with the rest of Grant County?
| Measure | 98851 | In Grant County | In WA |
|---|---|---|---|
| People (ACS 2020-2024) | 4,437 | 6th of 19 | 303rd of 605 |
| Median household income | $63k | not ranked | not ranked |
| Median home value | $243k | 7th of 9 | 377th of 392 |
98851's median household income is not ranked: its 90% margin of error (±$28,240) is more than a quarter of the figure ($63,333). 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 33% 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 98851?
The 2020 Census counted 4,472 people in 98851; the ACS, which samples households over 2020-2024, estimates 4,437. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 4,437±995 (90% margin)
- 2020 Census count
- 4,472
- Households
- 1,604
- Median age
- 35.9
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 98851?
Of the 4,437 people the ACS estimates in 98851, 27.7% are under 18 and 19.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (60.1%), then Hispanic or Latino (30.2%).
- Under 1827.7%
- 18 to 6452.7%
- 65 and older19.6%
- White, not Hispanic60.1%
- Hispanic or Latino30.2%
- Other or two or more9.7%
- 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 98851 earn?
Median household income is $63,333 (ACS 2020-2024).
- Median household income
- $63,333±$28,240
- Income per person
- $34,580
- Below the poverty line
- 17.7%
- Unemployed (of the labor force)
- 9.2%
- Adults 25+ with a bachelor's degree
- 14.6%
- Adjusted gross income per tax return, 2022
- $59,7391,830 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 98851?
FHFA's house price index for 98851, built from repeat sales and appraisals of the same homes, rose 91% from 2015 to 2025 and rose 59% from 2020 to 2025, and moved −8.4% in 2025.
- Median home value (owners' estimate)
- $242,800
- Median gross rent
- $1,001
- Homes owned by their occupants
- 66.5%
- Housing units
- 2,003
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 98851?
44 business establishments had a location in this ZIP code in 2023, 9 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction10
- Accommodation and food services8
- Transportation and warehousing6
- Real estate and rental and leasing5
- Arts, entertainment, and recreation4
- Retail trade3
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 98851?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 98853 | Stratford | 6 | – | 7.9 mi |
| 98823 | Ephrata | 12,188 | $73k | 10.8 mi |
| 99115 | Coulee City | 1,369 | $63k | 18.2 mi |
| 98837 | Moses Lake | 49,455 | $75k | 19.2 mi |
| 98860 | Wilson Creek | 277 | $63k | 15.2 mi (near) |
| 98832 | Marlin | 87 | $32k | 19.8 mi (near) |
| 99135 | Hartline | 395 | $81k | 23.3 mi (near) |
| 98845 | Palisades | 115 | $56k | 23.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.