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/ANDOVER

Andover ZIP code, Illinois

The ZIP code for Andover, IL is 61233, and its area code is 309.

USPS city name
1 ZIP code
Overlapping the city
2 more
Population
434
Area code
309

Mail addressed to Andover uses the ZIP code above. 2 more ZIP codes cover part of the city but are addressed as somewhere else; they are listed separately below.

Andover in numbers

About 434 people live in Andover, in 189 households. The median household income is $77,813 a year, 7% below the Illinois median of $83,390 (US: $80,734). The median owner-occupied home is valued at $163,600 (38% below the Illinois median), and median gross rent is $924 a month. The median age is 44.8; 20.9% of adults 25 and over hold a bachelor's degree or higher (37.8% across Illinois); the average commute takes 30 minutes.

Population434Andover434
Households189Andover189
Median age44.8Andover44.8Illinois39.0US 38.9
Median household income$77,813Andover$77,813Illinois$83,390US $80,734
Median home value$163,600Andover$163,600Illinois$263,300US $332,700
Median gross rent$924Andover$924Illinois$1,274US $1,413
Bachelor's degree or higher20.9%Andover20.9%Illinois37.8%US 35.7%
Mean commute29.7 minAndover29.7 minIllinois27.8 minUS 26.4 min
Population density438 / sq miAndover438 / sq mi

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

ZIP codes addressed as Andover

ZIP codes with the USPS city name Andover
ZIP City Type Population Median income Median home
61233 Andover , IL Standard 281 $71,667 $182,600

Other ZIP codes overlapping Andover

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

ZIP codes overlapping Andover
ZIP City Type Population Median income Median home
61238 Cambridge , IL Standard 2,549 $64,583 $131,100
61262 Lynn Center , IL Standard 1,197 $86,250 $244,700

Map of Andover ZIP codes

61233

The ZIP codes of Andover, 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 Andover

The nearest larger towns are Cambridge (2,128 people, 5.2 mi), Orion (1,812 people, 5.9 mi) and Woodhull (731 people, 8.2 mi).

Towns near Andover
TownPopulationDistance
Colona 5,139 12.5 mi
Coal Valley 4,229 12.6 mi
Geneseo 6,673 12.9 mi
Silvis 7,955 15.3 mi
East Moline 20,904 16.3 mi
Moline 42,197 16.7 mi
Milan 5,034 17.1 mi
Kewanee 11,913 19.3 mi
Rock Island 36,151 19.5 mi
Bettendorf, IA 39,647 21.1 mi
Le Claire, IA 4,735 21.2 mi
Galesburg 29,481 24.2 mi
Davenport, IA 100,913 24.3 mi
Aledo 3,668 24.6 mi

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

Cite this page

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

Underlying data is public domain or openly licensed — sources, vintages and licences.