About 62666 - Middletown, Illinois
The ZIP code 62666 of Middletown falls within Illinois, the United States - a densely populated area by population. It sits within Middletown County.
Census data puts the population of this ZIP code at 44,538 residents. That's noticeably above the average for a Illinois ZIP code, which sits near 22,656 people.
Median household income is about $78,900 (near the Illinois average).
This ZIP code sits alongside neighboring areas like Edwardsville, Rochelle, Champaign within Illinois.