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County ZIP codes · Washington · FIPS 53001

Adams County, WA ZIP Codes

Adams County, Washington has 11 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 5 of the residential ones lie mainly in Adams County and 6 mainly in a neighboring county; 9 cross the county line. Median household income ranges from $61,860 in 98857 (Warden) to $66,061 in 99169 (Ritzville) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Adams County?

98832 · Marlin: $32k98857 · Warden: $62k99032 · Sprague: $62k99105 · Benge: $51k99159 · Odessa: $65k99169 · Ritzville: $66k99326 · Connell: $83k99333 · Hooper: $98k99341 · Lind: $69k99344 · Othello: $65k99371 · Washtucna: $78k991699934499159993419883299032993719932698857991059933398832 · Marlin: $32k98857 · Warden: $62k99032 · Sprague: $62k99105 · Benge: $51k99159 · Odessa: $65k99169 · Ritzville: $66k99326 · Connell: $83k99333 · Hooper: $98k99341 · Lind: $69k99344 · Othello: $65k99371 · Washtucna: $78k991699934499159993419883299032993719932698857991059933398832 · Marlin: $32k98857 · Warden: $62k99032 · Sprague: $62k99105 · Benge: $51k99159 · Odessa: $65k99169 · Ritzville: $66k99326 · Connell: $83k99333 · Hooper: $98k99341 · Lind: $69k99344 · Othello: $65k99371 · Washtucna: $78k99169993449915999341988329903299371993269885799105
The residential ZIP codes of Adams County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024).<$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $61,860 and $64,888.

They carry 11 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 11 residential ZIP codes in Adams County

5 ZIP codes lie mainly in Adams County; 6 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Adams County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
99344 Othello 19,534 40 $65k $282k 65%
99169 Ritzville 2,587 4 $66k $228k 93%
99341 Lind 765 2 $69k $238k 100%
99371 Washtucna 394 2 $78k $218k 79%
99105 Benge 41 0 $51k $47k 100%

Partly in Adams County

Residential ZIP codes mainly in another county that reach at least 1% into Adams County, by their share here
In this county
99159 Odessa 1,323 3 $65k $241k 32%
98857 Warden 4,062 24 $62k $213k 31%
99326 Connell 6,336 26 $83k $321k 12%
99032 Sprague 1,018 4 $62k $205k 12%
99333 Hooper 151 2 $98k $450k 11%
98832 Marlin 87 0 $32k $309k 1%

Download the 11 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

9 ZIP codes of Adams County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Adams County and in the neighboring counties
ZIPIn AdamsElsewhere
9934465%Grant County19%; Franklin County16%
9932612%Franklin County88%
9885731%Grant County69%
9916993%Lincoln County7%
9915932%Lincoln County68%
9903212%Lincoln County86%; Spokane County2%
9937179%Franklin County21%
9933311%Whitman County89%
988321%Grant County70%; Lincoln County29%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Adams County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Adams County's ZIP codes use 4 prefixes: 988, 990, 991 and 993.

Three-digit prefixes of Adams County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Adams County's
PrefixSectional centerHereAll codes
988Wenatchee, WA (SCF 988)246
990Spokane, WA (SCF 990)132
991Spokane, WA (SCF 990)367
993Spokane, WA (SCF 990)536

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.