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County ZIP codes · Illinois · FIPS 17063

Grundy County, IL ZIP Codes

Grundy County, Illinois has 15 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 8 of the residential ones lie mainly in Grundy County and 7 mainly in a neighboring county; 11 cross the county line. Median household income ranges from $71,157 in 60420 (Dwight) to $118,976 in 60410 (Channahon) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Grundy County?

60407 · Braceville: $90k60410 · Channahon: $119k60416 · Coal City: $75k60420 · Dwight: $71k60424 · Gardner: $83k60437 · Kinsman: $59k60444 · Mazon: $88k60447 · Minooka: $108k60450 · Morris: $82k60470 · Ransom: $85k60474 · South Wilmington: $86k60479 · Verona: $105k60541 · Newark: $118k60961 · Reddick: $78k61360 · Seneca: $95k604506042060541604476136060424604446047060961604796041060416604376040760407 · Braceville: $90k60410 · Channahon: $119k60416 · Coal City: $75k60420 · Dwight: $71k60424 · Gardner: $83k60437 · Kinsman: $59k60444 · Mazon: $88k60447 · Minooka: $108k60450 · Morris: $82k60470 · Ransom: $85k60474 · South Wilmington: $86k60479 · Verona: $105k60541 · Newark: $118k60961 · Reddick: $78k61360 · Seneca: $95k604506042060541604476136060424604446047060961604796041060416604376040760407 · Braceville: $90k60410 · Channahon: $119k60416 · Coal City: $75k60420 · Dwight: $71k60424 · Gardner: $83k60437 · Kinsman: $59k60444 · Mazon: $88k60447 · Minooka: $108k60450 · Morris: $82k60470 · Ransom: $85k60474 · South Wilmington: $86k60479 · Verona: $105k60541 · Newark: $118k60961 · Reddick: $78k61360 · Seneca: $95k60450604206054160447613606042460444604706096160479604106041660437
The residential ZIP codes of Grundy 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 $81,777 and $95,093.

They carry 15 postal town names.

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

All 15 residential ZIP codes in Grundy County

8 ZIP codes lie mainly in Grundy County; 7 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Grundy County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
60450 Morris 20,783 132 $82k $276k 98%
60416 Coal City 9,550 419 $75k $222k 97%
60424 Gardner 2,153 41 $83k $197k 95%
60444 Mazon 1,901 38 $88k $219k 100%
60407 Braceville 1,812 134 $90k $191k 79%
60479 Verona 671 17 $105k $224k 100%
60474 South Wilmington 663 123 $86k $178k 100%
60437 Kinsman 117 6 $59k $129k 100%

Partly in Grundy County

Residential ZIP codes mainly in another county that reach at least 1% into Grundy County, by their share here
In this county
60420 Dwight 4,682 48 $71k $167k 28%
60447 Minooka 16,102 238 $108k $323k 21%
61360 Seneca 3,610 76 $95k $258k 21%
60410 Channahon 14,239 591 $119k $321k 17%
60541 Newark 3,342 40 $118k $314k 9%
60961 Reddick 740 19 $78k $159k 5%
60470 Ransom 358 8 $85k $131k 4%

Download the 15 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?

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

Share of each ZIP code's land in Grundy County and in the neighboring counties
ZIPIn GrundyElsewhere
6045098%Kendall County 2%
6044721%Kendall County 73%; Will County 6%
6041017%Will County 83%
6041697%Will County 3%
6042028%Livingston County 72%
6136021%LaSalle County 79%
605419%Kendall County 90%
6042495%Kankakee County 5%
6040779%Will County 21%
609615%Kankakee County 68%; Livingston County 26%
604704%LaSalle County 92%; Livingston County 4%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Grundy County's ZIP codes use 4 prefixes: 604, 605, 609 and 613.

Three-digit prefixes of Grundy 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 Grundy County's
PrefixSectional centerHereAll codes
604 South Suburban, IL (SCF 604) 12 83
605 Fox Valley, IL (SCF 605) 1 65
609 Champaign, IL (SCF 618) 1 57
613 Peoria, IL (SCF 615) 1 62

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