About 61878 - Thomasboro, Illinois
The ZIP code 61878 of Thomasboro falls within Illinois, the United States - a densely populated area by population. It sits within Thomasboro County.
Census data puts the population of this ZIP code at 42,142 residents. That's noticeably above the average for a Illinois ZIP code, which sits near 22,656 people.
Median household income is about $60,300 (below the Illinois average).
This ZIP code sits alongside neighboring areas like Edwardsville, Rochelle, Champaign within Illinois.