Plain

County ZIP codes · Illinois · FIPS 17161

Rock Island County, IL ZIP Codes

Rock Island County, Illinois has 24 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 21 residential and 3 for PO boxes or a single organization. 17 of the residential ones lie mainly in Rock Island County and 4 mainly in a neighboring county; 7 cross the county line. Median household income ranges from $59,396 in 61201 (Rock Island) to $113,220 in 61240 (Coal Valley) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Rock Island County?

61201 · Rock Island: $59k61232 · Andalusia: $74k61236 · Barstow: $78k61237 · Buffalo Prairie: –61239 · Carbon Cliff: $32k61240 · Coal Valley: $113k61242 · Cordova: $104k61244 · East Moline: $64k61256 · Hampton: $90k61257 · Hillsdale: $64k61259 · Illinois City: $92k61264 · Milan: $78k61265 · Moline: $67k61272 · New Boston: $64k61273 · Orion: $99k61275 · Port Byron: $108k61278 · Rapids City: $70k61279 · Reynolds: $88k61281 · Sherrard: $103k61282 · Silvis: $64k61284 · Taylor Ridge: $101k612646127261259612796125761284612406127361244612816124261201612656123261201 · Rock Island: $59k61232 · Andalusia: $74k61236 · Barstow: $78k61237 · Buffalo Prairie: –61239 · Carbon Cliff: $32k61240 · Coal Valley: $113k61242 · Cordova: $104k61244 · East Moline: $64k61256 · Hampton: $90k61257 · Hillsdale: $64k61259 · Illinois City: $92k61264 · Milan: $78k61265 · Moline: $67k61272 · New Boston: $64k61273 · Orion: $99k61275 · Port Byron: $108k61278 · Rapids City: $70k61279 · Reynolds: $88k61281 · Sherrard: $103k61282 · Silvis: $64k61284 · Taylor Ridge: $101k6126461272612596127961257612846124061273612446128161242612016126561201 · Rock Island: $59k61232 · Andalusia: $74k61236 · Barstow: $78k61237 · Buffalo Prairie: –61239 · Carbon Cliff: $32k61240 · Coal Valley: $113k61242 · Cordova: $104k61244 · East Moline: $64k61256 · Hampton: $90k61257 · Hillsdale: $64k61259 · Illinois City: $92k61264 · Milan: $78k61265 · Moline: $67k61272 · New Boston: $64k61273 · Orion: $99k61275 · Port Byron: $108k61278 · Rapids City: $70k61279 · Reynolds: $88k61281 · Sherrard: $103k61282 · Silvis: $64k61284 · Taylor Ridge: $101k612646127261259612796125761284612406127361244612816124261201
The residential ZIP codes of Rock Island 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 $64,398 and $100,505.

They carry 21 postal town names.

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

All 21 residential ZIP codes in Rock Island County

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

Residential ZIP codes mainly in Rock Island County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
61265 Moline 43,748 2,276 $67k $147k 100%
61201 Rock Island 36,766 2,057 $59k $126k 100%
61244 East Moline 23,308 865 $64k $139k 100%
61264 Milan 10,073 146 $78k $153k 98%
61282 Silvis 8,394 2,672 $64k $160k 100%
61240 Coal Valley 5,795 159 $113k $237k 54%
61275 Port Byron 4,253 128 $108k $246k 100%
61284 Taylor Ridge 2,599 59 $101k $237k 100%
61256 Hampton 1,926 1,298 $90k $185k 100%
61232 Andalusia 1,469 455 $74k $186k 100%
61239 Carbon Cliff 1,189 1,503 $32k $99k 100%
61242 Cordova 1,135 36 $104k $218k 100%
61259 Illinois City 1,053 14 $92k $201k 97%
61257 Hillsdale 844 20 $64k $117k 100%
61278 Rapids City 678 437 $70k $219k 100%
61236 Barstow 34 42 $78k $159k 100%
61237 Buffalo Prairie no residents 0 – – 100%

Partly in Rock Island County

Residential ZIP codes mainly in another county that reach at least 1% into Rock Island County, by their share here
In this county
61279 Reynolds 1,015 26 $88k $162k 47%
61273 Orion 3,120 68 $99k $187k 24%
61281 Sherrard 2,520 63 $103k $224k 17%
61272 New Boston 1,437 16 $64k $146k 3%

Download the 24 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 Rock Island County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Rock Island County and in the neighboring counties
ZIPIn Rock IslandElsewhere
6126498%Mercer County 2%
6124054%Henry County 46%
6127324%Henry County 76%
6128117%Mercer County 83%
612723%Mercer County 97%
6125997%Mercer County 3%
6127947%Mercer County 53%

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

PO Box and single-organization ZIP codes

ZIP codes in Rock Island County without a residential area (GeoNames postal codes)
ZIPPostal name
61204Rock Island
61266Moline
61299Rock Island

Source: GeoNames postal codes (CC BY 4.0).

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Rock Island County starts with 612.

Three-digit prefixes of Rock Island 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 Rock Island County's
PrefixSectional centerHereAll codes
612 Quad Cities, IL (SCF 612) 24 47

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