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County ZIP codes · Washington · FIPS 53005

Benton County, WA ZIP Codes

Benton County, Washington has 12 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 11 of the residential ones lie mainly in Benton County and 1 mainly in a neighboring county; 3 cross the county line. Median household income ranges from $62,527 in 99336 (Kennewick) to $121,845 in 99353 (West Richland) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Benton County?

98930 · Grandview: $65k98944 · Sunnyside: $64k99320 · Benton City: $90k99336 · Kennewick: $63k99337 · Kennewick: $99k99338 · Kennewick: $111k99345 · Paterson: $103k99346 · Plymouth: $51k99350 · Prosser: $81k99352 · Richland: $100k99353 · West Richland: $122k99354 · Richland: $92k993509894499320993379934599346989309933899354993529933698930 · Grandview: $65k98944 · Sunnyside: $64k99320 · Benton City: $90k99336 · Kennewick: $63k99337 · Kennewick: $99k99338 · Kennewick: $111k99345 · Paterson: $103k99346 · Plymouth: $51k99350 · Prosser: $81k99352 · Richland: $100k99353 · West Richland: $122k99354 · Richland: $92k993509894499320993379934599346989309933899354993529933698930 · Grandview: $65k98944 · Sunnyside: $64k99320 · Benton City: $90k99336 · Kennewick: $63k99337 · Kennewick: $99k99338 · Kennewick: $111k99345 · Paterson: $103k99346 · Plymouth: $51k99350 · Prosser: $81k99352 · Richland: $100k99353 · West Richland: $122k99354 · Richland: $92k993509894499320993379934599346989309933899352
The residential ZIP codes of Benton 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 $64,583 and $98,848.

They carry 9 postal town names.

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

All 12 residential ZIP codes in Benton County

11 ZIP codes lie mainly in Benton County; 1 more reaches into it from a neighboring county and follows the first table.

Residential ZIP codes mainly in Benton County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
99336 Kennewick 50,735 3,787 $63k $324k 100%
99352 Richland 37,430 1,560 $100k $474k 100%
99337 Kennewick 33,287 201 $99k $396k 100%
99354 Richland 25,559 1,068 $92k $393k 100%
98944 Sunnyside 22,817 42 $64k $260k 73%
99338 Kennewick 20,633 582 $111k $552k 100%
99353 West Richland 19,251 746 $122k $451k 100%
99350 Prosser 14,837 25 $81k $339k 87%
99320 Benton City 9,879 47 $90k $374k 100%
99346 Plymouth 198 1 $51k $209k 100%
99345 Paterson 162 1 $103k $416k 100%

Partly in Benton County

Residential ZIP codes mainly in another county that reach at least 1% into Benton County, by their share here
In this county
98930 Grandview 15,730 351 $65k $304k 38%

Download the 12 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?

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

Share of each ZIP code's land in Benton County and in the neighboring counties
ZIPIn BentonElsewhere
9894473%Yakima County27%
9893038%Yakima County62%
9935087%Klickitat County13%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Benton County's ZIP codes use 2 prefixes: 989 and 993.

Three-digit prefixes of Benton 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 Benton County's
PrefixSectional centerHereAll codes
989Yakima, WA (SCF 989)234
993Spokane, WA (SCF 990)1036

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