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/FRANKLIN-GROVE

Franklin Grove ZIP code, Illinois

The ZIP code for Franklin Grove, IL is 61031, and its area codes are 815 and 779.

USPS city name
1 ZIP code
Population
988
Area codes
815, 779

Franklin Grove in numbers

About 988 people live in Franklin Grove, in 385 households. The median household income is $58,618 a year, 30% below the Illinois median of $83,390 (US: $80,734). The median owner-occupied home is valued at $124,400 (53% below the Illinois median), and median gross rent is $800 a month. The median age is 47.8; 17.2% of adults 25 and over hold a bachelor's degree or higher (37.8% across Illinois); the average commute takes 27 minutes.

Population988Franklin Grove988
Households385Franklin Grove385
Median age47.8Franklin Grove47.8Illinois39.0US 38.9
Median household income$58,618Franklin Grove$58,618Illinois$83,390US $80,734
Median home value$124,400Franklin Grove$124,400Illinois$263,300US $332,700
Median gross rent$800Franklin Grove$800Illinois$1,274US $1,413
Bachelor's degree or higher17.2%Franklin Grove17.2%Illinois37.8%US 35.7%
Mean commute26.6 minFranklin Grove26.6 minIllinois27.8 minUS 26.4 min
Population density2,375 / sq miFranklin Grove2,375 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Franklin Grove village. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Franklin Grove

ZIP codes with the USPS city name Franklin Grove
ZIP City Type Population Median income Median home
61031 Franklin Grove , IL Standard 1,492 $75,446 $136,700

Map of Franklin Grove ZIP codes

61031

The ZIP codes of Franklin Grove, 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 Franklin Grove

The nearest larger towns are Amboy (2,384 people, 8.9 mi), Dixon (14,910 people, 9.1 mi) and Oregon (3,851 people, 12 mi).

Towns near Franklin Grove
TownPopulationDistance
Dixon 14,910 9.1 mi
Oregon 3,851 12.0 mi
Rochelle 9,529 13.3 mi
Mount Morris 2,726 15.8 mi
Byron 3,743 19.5 mi
Sterling 14,717 20.6 mi
Rock Falls 8,587 20.9 mi
Davis Junction 2,757 21.7 mi
Mendota 6,994 22.2 mi
DeKalb 40,443 29.0 mi
Winnebago 2,981 29.6 mi

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

Cite this page

zipcodes.pro. “Franklin Grove, IL ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/il/franklin-grove

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