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County ZIP codes · Idaho · FIPS 16009

Benewah County, ID ZIP Codes

Benewah County, Idaho has 7 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 6 of the residential ones lie mainly in Benewah County and 1 mainly in a neighboring county; 4 cross the county line. Median household income ranges from $57,356 in 83851 (Plummer) to $65,508 in 83861 (Saint Maries) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Benewah County?

83824 · Desmet: $53k83830 · Fernwood: $108k83851 · Plummer: $57k83861 · Saint Maries: $66k83866 · Santa: $32k83870 · Tensed: $51k99033 · Tekoa: $59k8386183870838518382483866838309903383824 · Desmet: $53k83830 · Fernwood: $108k83851 · Plummer: $57k83861 · Saint Maries: $66k83866 · Santa: $32k83870 · Tensed: $51k99033 · Tekoa: $59k83861838708385183866838309903383824 · Desmet: $53k83830 · Fernwood: $108k83851 · Plummer: $57k83861 · Saint Maries: $66k83866 · Santa: $32k83870 · Tensed: $51k99033 · Tekoa: $59k838618387083851838668383099033
The residential ZIP codes of Benewah 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?

They carry 7 postal town names: Saint Maries, Plummer, Tekoa, Desmet, Tensed, Santa, Fernwood.

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

All 7 residential ZIP codes in Benewah County

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

Residential ZIP codes mainly in Benewah County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
83861 Saint Maries 7,275 16 $66k $308k 89%
83851 Plummer 2,113 17 $57k $251k 100%
83824 Desmet 452 6 $53k $337k 74%
83870 Tensed 421 7 $51k $486k 100%
83866 Santa 352 6 $32k $271k 100%
83830 Fernwood 45 1 $108k $281k 71%

Partly in Benewah County

Residential ZIP codes mainly in another county that reach at least 1% into Benewah County, by their share here
In this county
99033 Tekoa 832 21 $59k $253k 2%

Download the 7 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?

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

Share of each ZIP code's land in Benewah County and in the neighboring counties
ZIPIn BenewahElsewhere
8386189%Shoshone County 6%; Kootenai County 5%
990332%Whitman County 82%; Spokane County 16%
8382474%Latah County 26%
8383071%Shoshone County 29%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Benewah County's ZIP codes use 2 prefixes: 838 and 990.

Three-digit prefixes of Benewah 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 Benewah County's
PrefixSectional centerHereAll codes
838 Spokane, WA (SCF 990) 6 64
990 Spokane, WA (SCF 990) 1 32

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