Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/IL/HOLCOMB

Holcomb ZIP code, Illinois

The ZIP code for Holcomb, IL is 61043, and its area code is 815.

USPS city name
1 ZIP code
Overlapping the city
1 more
Population
152
Area code
815

NANPA lists no telephone rate centre for Holcomb itself, so these are the area codes of the nearest one, Stillman Valley (5.9 miles). A town on an area-code boundary can differ from its neighbour.

Mail addressed to Holcomb uses the ZIP code above. 1 more ZIP code covers part of the city but is addressed as somewhere else; they are listed separately below.

ZIP codes addressed as Holcomb

ZIP codes with the USPS city name Holcomb
ZIP City Type Population Median income Median home
61043 Holcomb , IL Standard 143 $69,063 $124,000

Other ZIP codes overlapping Holcomb

These ZIP codes cover part of Holcomb but are addressed as somewhere else.

ZIP codes overlapping Holcomb
ZIP City Type Population Median income Median home
61020 Davis Junction , IL Standard 3,149 $105,769 $202,800

Map of Holcomb ZIP codes

61043

The ZIP codes of Holcomb, IL, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Holcomb

The nearest larger towns are Davis Junction (2,757 people, 3.5 mi), Kings (332 people, 4.3 mi) and Stillman Valley (1,260 people, 5.1 mi).

Towns near Holcomb
TownPopulationDistance
Davis Junction 2,757 3.5 mi
Byron 3,743 9.6 mi
Rochelle 9,529 10.2 mi
Oregon 3,851 12.8 mi
Cherry Valley 3,749 13.3 mi
Rockford 147,521 13.6 mi
Winnebago 2,981 15.7 mi
Mount Morris 2,726 17.1 mi
Belvidere 24,752 17.5 mi
Loves Park 23,502 19.5 mi
DeKalb 40,443 20.3 mi
Genoa 5,492 20.7 mi
Machesney Park 22,630 21.3 mi
Sycamore 18,559 22.0 mi

More nearby: every ZIP code in Ogle County · Illinois ZIP codes

Cite this page

zipcodes.pro. “Holcomb, IL ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/il/holcomb

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