Illiopolis, IL ZIP Codes, Coordinates & Counties
Illiopolis, Illinois has 1 ZIP code in Sangamon county. The approximate center of Illiopolis is 39.866, -89.251. Illiopolis has about 12,331 known street addresses.
ZIP codes in Illiopolis, IL
| ZIP Code | County | Latitude | Longitude |
|---|---|---|---|
| 62539 | Sangamon | 39.866 | -89.251 |
Counties Illiopolis spans
Sangamon
Most common streets in Illiopolis
Elizabeth, 5th, 4th, 3rd, 7th, Anne, Acom, Louisa, Riverside, 9th
Frequently asked questions
What ZIP codes are in Illiopolis, IL?
Illiopolis, Illinois has 1 ZIP code, ranging from 62539 to 62539. The full list, with each ZIP's county and coordinates, is in the table on this page.
What county is Illiopolis, IL in?
Illiopolis is in Sangamon county.
What are the latitude and longitude of Illiopolis, IL?
The approximate center of Illiopolis, Illinois is latitude 39.866, longitude -89.251. Coordinates for each ZIP code are listed in the table above.
How many ZIP codes does Illiopolis, IL have?
Illiopolis has 1 ZIP code.
How many addresses are in Illiopolis, IL?
Illiopolis, Illinois has about 12,331 known street addresses in the sthan.io US address database.
What are the most common streets in Illiopolis, IL?
Some of the most common street names in Illiopolis are Elizabeth, 5th, 4th, 3rd, 7th, Anne.
What cities are near Illiopolis, IL?
Cities near Illiopolis include Niantic (5 mi), Buffalo (7 mi), Mount Auburn (7 mi), Harristown (8 mi), Mount Pulaski (8 mi).
Cities near Illiopolis
Niantic, IL (5 mi) Buffalo, IL (7 mi) Mount Auburn, IL (7 mi) Harristown, IL (8 mi) Mount Pulaski, IL (8 mi) Cornland, IL (9 mi) Lake Fork, IL (9 mi) Latham, IL (9 mi)
Need this for any US address, in code?
Get the ZIP code, county, and coordinates for any US address through the sthan.io API. Free 100 requests/month, no credit card required.
View the API →Last updated: June 2026 · Data: sthan.io US address database