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/KNOXVILLE

Knoxville ZIP code, Illinois

The ZIP code for Knoxville, IL is 61448, and its area code is 309.

USPS city name
1 ZIP code
Overlapping the city
1 more
Population
3,211
Area code
309

Mail addressed to Knoxville 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.

Knoxville in numbers

About 3,211 people live in Knoxville, in 1,357 households. The median household income is $82,863 a year, about the same as the Illinois median of $83,390 (US: $80,734). The median owner-occupied home is valued at $145,300 (45% below the Illinois median), and median gross rent is $623 a month. The median age is 42.6; 24.8% of adults 25 and over hold a bachelor's degree or higher (37.8% across Illinois); the average commute takes 21 minutes.

Population3,211Knoxville3,211
Households1,357Knoxville1,357
Median age42.6Knoxville42.6Illinois39.0US 38.9
Median household income$82,863Knoxville$82,863Illinois$83,390US $80,734
Median home value$145,300Knoxville$145,300Illinois$263,300US $332,700
Median gross rent$623Knoxville$623Illinois$1,274US $1,413
Bachelor's degree or higher24.8%Knoxville24.8%Illinois37.8%US 35.7%
Mean commute20.7 minKnoxville20.7 minIllinois27.8 minUS 26.4 min
Population density1,366 / sq miKnoxville1,366 / sq mi

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

ZIP codes addressed as Knoxville

ZIP codes with the USPS city name Knoxville
ZIP City Type Population Median income Median home
61448 Knoxville , IL Standard 3,947 $82,500 $146,100

Other ZIP codes overlapping Knoxville

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

ZIP codes overlapping Knoxville
ZIP City Type Population Median income Median home
61401 Galesburg , IL Standard 30,580 $50,546 $100,600

Map of Knoxville ZIP codes

61448

The ZIP codes of Knoxville, 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 Knoxville

The nearest larger towns are Galesburg (29,481 people, 5.6 mi), Abingdon (3,443 people, 9.3 mi) and Monmouth (8,581 people, 19 mi).

Towns near Knoxville
TownPopulationDistance
Galesburg 29,481 5.6 mi
Abingdon 3,443 9.3 mi
Monmouth 8,581 18.7 mi
Canton 13,144 27.1 mi
Bushnell 2,677 27.1 mi
Kewanee 11,913 29.6 mi

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

Cite this page

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

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