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/FLAT-ROCK

Flat Rock ZIP code, Illinois

The ZIP code for Flat Rock, IL is 62427, and its area code is 618.

USPS city name
1 ZIP code
Population
337
Area code
618

Flat Rock in numbers

About 337 people live in Flat Rock, in 146 households. The median household income is $51,667 a year, 38% below the Illinois median of $83,390 (US: $80,734). The median owner-occupied home is valued at $66,600 (75% below the Illinois median). The median age is 41.5; 7.2% of adults 25 and over hold a bachelor's degree or higher (37.8% across Illinois); the average commute takes 26 minutes.

Population337Flat Rock337
Households146Flat Rock146
Median age41.5Flat Rock41.5Illinois39.0US 38.9
Median household income$51,667Flat Rock$51,667Illinois$83,390US $80,734
Median home value$66,600Flat Rock$66,600Illinois$263,300US $332,700
Bachelor's degree or higher7.2%Flat Rock7.2%Illinois37.8%US 35.7%
Mean commute25.8 minFlat Rock25.8 minIllinois27.8 minUS 26.4 min
Population density394 / sq miFlat Rock394 / sq mi

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

ZIP codes addressed as Flat Rock

ZIP codes with the USPS city name Flat Rock
ZIP City Type Population Median income Median home
62427 Flat Rock , IL Standard 1,730 $81,250 $160,700

Map of Flat Rock ZIP codes

62427

The ZIP codes of Flat Rock, 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 Flat Rock

The nearest larger towns are Palestine (1,430 people, 7.5 mi), Robinson (7,084 people, 7.9 mi) and Lawrenceville (3,941 people, 12 mi).

Towns near Flat Rock
TownPopulationDistance
Robinson 7,084 7.9 mi
Lawrenceville 3,941 12.3 mi
Vincennes, IN 16,586 18.0 mi
Sullivan, IN 4,252 19.6 mi
Bicknell, IN 3,017 21.6 mi
Olney 8,577 25.2 mi
Newton 2,932 27.0 mi
Linton, IN 5,260 29.2 mi

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

Cite this page

zipcodes.pro. “Flat Rock, IL ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/il/flat-rock

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