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/MASON-CITY

Mason City ZIP code, Illinois

The ZIP code for Mason City, IL is 62664, and its area codes are 217 and 447.

USPS city name
1 ZIP code
Population
2,159
Area codes
217, 447

Mason City in numbers

About 2,159 people live in Mason City, in 1,054 households. The median household income is $66,524 a year, 20% below the Illinois median of $83,390 (US: $80,734). The median owner-occupied home is valued at $91,100 (65% below the Illinois median), and median gross rent is $767 a month. The median age is 49.8; 21.1% of adults 25 and over hold a bachelor's degree or higher (37.8% across Illinois); the average commute takes 32 minutes.

Population2,159Mason City2,159
Households1,054Mason City1,054
Median age49.8Mason City49.8Illinois39.0US 38.9
Median household income$66,524Mason City$66,524Illinois$83,390US $80,734
Median home value$91,100Mason City$91,100Illinois$263,300US $332,700
Median gross rent$767Mason City$767Illinois$1,274US $1,413
Bachelor's degree or higher21.1%Mason City21.1%Illinois37.8%US 35.7%
Mean commute32.4 minMason City32.4 minIllinois27.8 minUS 26.4 min
Population density2,131 / sq miMason City2,131 / sq mi

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

ZIP codes addressed as Mason City

ZIP codes with the USPS city name Mason City
ZIP City Type Population Median income Median home
62664 Mason City , IL Standard 2,922 $70,509 $101,200

Map of Mason City ZIP codes

62664

The ZIP codes of Mason City, 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 Mason City

The nearest larger towns are Petersburg (2,341 people, 15 mi), Lincoln (13,281 people, 18 mi) and Havana (2,989 people, 20 mi).

Towns near Mason City
TownPopulationDistance
Lincoln 13,281 17.6 mi
Havana 2,989 20.1 mi
Sherman 4,386 22.1 mi
Pekin 31,781 25.6 mi
Riverton 3,513 26.0 mi
Springfield 113,330 28.5 mi

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

Cite this page

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

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