Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — CITY/IL/FAIRFIELD

Fairfield ZIP code, Illinois

The ZIP code for Fairfield, IL is 62837, and its area code is 618.

USPS city name
1 ZIP code
Population
4,561
Area code
618

Fairfield in numbers

About 4,561 people live in Fairfield, in 2,314 households. The median household income is $41,989 a year, 50% below the Illinois median of $83,390 (US: $80,734). The median owner-occupied home is valued at $88,800 (66% below the Illinois median), and median gross rent is $585 a month. The median age is 46.4; 14.8% of adults 25 and over hold a bachelor's degree or higher (37.8% across Illinois); the average commute takes 18 minutes.

Population4,561Fairfield4,561
Households2,314Fairfield2,314
Median age46.4Fairfield46.4Illinois39.0US 38.9
Median household income$41,989Fairfield$41,989Illinois$83,390US $80,734
Median home value$88,800Fairfield$88,800Illinois$263,300US $332,700
Median gross rent$585Fairfield$585Illinois$1,274US $1,413
Bachelor's degree or higher14.8%Fairfield14.8%Illinois37.8%US 35.7%
Mean commute18.0 minFairfield18.0 minIllinois27.8 minUS 26.4 min
Population density1,113 / sq miFairfield1,113 / 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
62837 Fairfield , IL Standard 7,868 $50,536 $103,900

Map of Fairfield ZIP codes

62837

The ZIP codes of Fairfield, 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 Fairfield

The nearest larger towns are Carmi (4,845 people, 23 mi), Olney (8,577 people, 29 mi) and Mount Vernon (14,090 people, 30 mi).

Towns near Fairfield
TownPopulationDistance
Flora 4,475 20.4 mi
McLeansboro 2,675 22.0 mi
Carmi 4,845 23.1 mi
Olney 8,577 28.6 mi
Mount Vernon 14,090 29.9 mi

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

Cite this page

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

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