Plain

County ZIP codes · Illinois · FIPS 17195

Whiteside County, IL ZIP Codes

Whiteside County, Illinois has 13 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 12 of the residential ones lie mainly in Whiteside County and 1 mainly in a neighboring county; 8 cross the county line. Median household income ranges from $60,508 in 61071 (Rock Falls) to $80,867 in 61270 (Morrison) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Whiteside County?

61014 · Chadwick: $69k61037 · Galt: $70k61071 · Rock Falls: $61k61081 · Sterling: $68k61230 · Albany: $62k61243 · Deer Grove: $148k61250 · Erie: $85k61251 · Fenton: $80k61252 · Fulton: $60k61261 · Lyndon: $64k61270 · Morrison: $81k61277 · Prophetstown: $70k61283 · Tampico: $64k61277612706125061081612526107161283610146125161261612306124361014 · Chadwick: $69k61037 · Galt: $70k61071 · Rock Falls: $61k61081 · Sterling: $68k61230 · Albany: $62k61243 · Deer Grove: $148k61250 · Erie: $85k61251 · Fenton: $80k61252 · Fulton: $60k61261 · Lyndon: $64k61270 · Morrison: $81k61277 · Prophetstown: $70k61283 · Tampico: $64k61277612706125061081612526107161283610146125161261612306124361014 · Chadwick: $69k61037 · Galt: $70k61071 · Rock Falls: $61k61081 · Sterling: $68k61230 · Albany: $62k61243 · Deer Grove: $148k61250 · Erie: $85k61251 · Fenton: $80k61252 · Fulton: $60k61261 · Lyndon: $64k61270 · Morrison: $81k61277 · Prophetstown: $70k61283 · Tampico: $64k6127761270612506108161252610716128361014612516126161243
The residential ZIP codes of Whiteside 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 $64,063 and $69,329.

They carry 13 postal town names.

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

All 13 residential ZIP codes in Whiteside County

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

Residential ZIP codes mainly in Whiteside County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
61081 Sterling 20,844 168 $68k $123k 95%
61071 Rock Falls 13,581 187 $61k $102k 89%
61270 Morrison 6,912 46 $81k $165k 99%
61252 Fulton 5,437 93 $60k $142k 100%
61277 Prophetstown 3,054 23 $70k $148k 60%
61250 Erie 2,781 32 $85k $168k 94%
61283 Tampico 1,269 15 $64k $122k 51%
61230 Albany 1,039 54 $62k $139k 100%
61261 Lyndon 656 40 $64k $134k 100%
61251 Fenton 377 21 $80k $191k 100%
61243 Deer Grove 155 6 $148k $173k 95%
61037 Galt 145 1,066 $70k $104k 100%

Partly in Whiteside County

Residential ZIP codes mainly in another county that reach at least 1% into Whiteside County, by their share here
In this county
61014 Chadwick 1,067 17 $69k $104k 15%

Download the 13 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?

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

Share of each ZIP code's land in Whiteside County and in the neighboring counties
ZIPIn WhitesideElsewhere
6108195%Lee County 5%
6107189%Lee County 11%
6127099%Carroll County 1%
6127760%Henry County 40%
6125094%Henry County 6%
6128351%Bureau County 47%; Henry County 2%
6101415%Carroll County 85%
6124395%Lee County 5%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Whiteside County's ZIP codes use 2 prefixes: 610 and 612.

Three-digit prefixes of Whiteside 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 Whiteside County's
PrefixSectional centerHereAll codes
610 Palatine, IL (SCF 600) 4 66
612 Quad Cities, IL (SCF 612) 9 47

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