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County ZIP codes · Illinois · FIPS 17175

Stark County, IL ZIP Codes

Stark County, Illinois has 9 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 5 of the residential ones lie mainly in Stark County and 4 mainly in a neighboring county; 7 cross the county line. Median household income ranges from $52,615 in 61443 (Kewanee) to $63,558 in 61483 (Toulon) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Stark County?

61345 · Neponset: $76k61421 · Bradford: $66k61426 · Castleton: –61443 · Kewanee: $53k61449 · La Fayette: $52k61479 · Speer: $135k61483 · Toulon: $64k61491 · Wyoming: $63k61559 · Princeville: $101k614836155961491614436142161345614496147961345 · Neponset: $76k61421 · Bradford: $66k61426 · Castleton: –61443 · Kewanee: $53k61449 · La Fayette: $52k61479 · Speer: $135k61483 · Toulon: $64k61491 · Wyoming: $63k61559 · Princeville: $101k614836155961491614436142161345614496147961345 · Neponset: $76k61421 · Bradford: $66k61426 · Castleton: –61443 · Kewanee: $53k61449 · La Fayette: $52k61479 · Speer: $135k61483 · Toulon: $64k61491 · Wyoming: $63k61559 · Princeville: $101k6148361559614916144361421613456144961479
The residential ZIP codes of Stark 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 9 postal town names.

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

All 9 residential ZIP codes in Stark County

5 ZIP codes lie mainly in Stark County; 4 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Stark County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
61491 Wyoming 2,230 23 $63k $120k 89%
61483 Toulon 1,801 18 $64k $109k 100%
61421 Bradford 1,231 12 $66k $91k 55%
61449 La Fayette 339 9 $52k $66k 69%
61426 Castleton 41 13 – – 100%

Partly in Stark County

Residential ZIP codes mainly in another county that reach at least 1% into Stark County, by their share here
In this county
61479 Speer 95 8 $135k $205k 49%
61559 Princeville 3,595 37 $101k $184k 9%
61345 Neponset 770 16 $76k $100k 8%
61443 Kewanee 13,456 134 $53k $80k 4%

Download the 9 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?

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

Share of each ZIP code's land in Stark County and in the neighboring counties
ZIPIn StarkElsewhere
614434%Henry County 94%; Bureau County 3%
615599%Peoria County 91%
6149189%Marshall County 11%
6142155%Bureau County 36%; Marshall County 9%
613458%Bureau County 92%
6144969%Knox County 31%
6147949%Marshall County 51%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Stark County's ZIP codes use 3 prefixes: 613, 614 and 615.

Three-digit prefixes of Stark 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 Stark County's
PrefixSectional centerHereAll codes
613 Peoria, IL (SCF 615) 1 62
614 Peoria, IL (SCF 615) 7 73
615 Peoria, IL (SCF 615) 1 48

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