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/IA/FAIRFIELD

Fairfield ZIP codes, Iowa

Fairfield, IA has 2 ZIP codes (52556 and 52557) and area code 641. The largest is 52556.

USPS city name
2 ZIP codes
Population
9,456
Area code
641
State
Iowa

Fairfield in numbers

About 9,456 people live in Fairfield, in 4,115 households, the 45th-largest of Iowa's 1,017 census places. The median household income is $51,311 a year, 32% below the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $156,000 (25% below the Iowa median), and median gross rent is $870 a month. The median age is 40.0; 52.9% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 13 minutes.

Population9,456Fairfield9,456
Households4,115Fairfield4,115
Median age40.0Fairfield40.0Iowa38.6US 38.9
Median household income$51,311Fairfield$51,311Iowa$75,059US $80,734
Median home value$156,000Fairfield$156,000Iowa$208,000US $332,700
Median gross rent$870Fairfield$870Iowa$972US $1,413
Bachelor's degree or higher52.9%Fairfield52.9%Iowa31.4%US 35.7%
Mean commute13.2 minFairfield13.2 minIowa19.8 minUS 26.4 min
Population density1,430 / sq miFairfield1,430 / sq mi

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

ZIP codes addressed as Fairfield

ZIP codes with the USPS city name Fairfield
ZIP City Type Population Median income Median home
52556 Fairfield , IA Standard 11,448 $59,243 $166,800
52557 Fairfield , IA Standard 685 — —

Map of Fairfield ZIP codes

5255652557

The ZIP codes of Fairfield, IA, 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 Fairfield

The nearest larger towns are Ottumwa (25,430 people, 24 mi), Oskaloosa (11,504 people, 40 mi) and Fort Madison (10,133 people, 42 mi).

Towns near Fairfield
TownPopulationDistance
Mount Pleasant 8,951 22.1 mi
Ottumwa 25,430 23.8 mi
Washington 7,290 24.6 mi
Bloomfield 2,742 29.5 mi

More nearby: every ZIP code in Jefferson County · Iowa ZIP codes

Cite this page

zipcodes.pro. “Fairfield, IA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ia/fairfield

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