Clinton County, IL: Cities, ZIP Codes & Population
Clinton County is a county-level area in Illinois identified by the FIPS code 17027. Our data lists 15 places in it, led by Breese, IL, with combined estimates of about 25,184 people across those places. This page shows its cities, ZIP codes, time zone and neighboring counties.
What are the key facts about Clinton County?
| County | Clinton County |
|---|---|
| State | Illinois |
| FIPS code | 17027 |
| Places in our data | 15 |
| Places with a city page | 1 |
| Combined place estimates | 25,184 |
| Largest place | Breese, IL (5,853) |
| Rank in state | 39th of 102 counties by combined place population |
| Weighted density | 1,364 per sq mi |
| Time zone | Central time |
| ZIP codes | 13 |
Which cities and towns are in Clinton County?
Clinton County has 1 place large enough for a full page on this site. They are ranked below by estimated population, together with whether each is incorporated, its density in people per square mile and the number of ZIP codes it uses. Breese, IL is the largest.
| Place | Type | Population | Per sq mi | ZIPs |
|---|---|---|---|---|
| Breese, IL | Incorporated | 5,853 | 1,678 | 1 |
The county also contains 14 smaller communities that appear here but do not have separate pages because their populations are too small for reliable data: Carlyle, New Baden, Trenton, Aviston, Germantown, Albers, Wamac, Beckemeyer, Bartelso, Damiansville, Hoffman, St. Rose, Keyesport, Huey. Residents of these places often depend on the county for services such as roads, courts and public health.
How large is Clinton County compared with other counties in Illinois?
Adding up the estimates for the places in our data gives 25,184 people, which ranks Clinton County 39th among 102 counties in Illinois. The average listed place has about 1,679 residents. The weighted density is about 1,364 people per square mile, which is suburban by our scale. These totals add up place estimates, so they can differ from the official county population, which includes people outside any listed place. See why population figures differ.
What ZIP codes are in Clinton County?
The places in Clinton County use 13 ZIP codes: 62215, 62216, 62218, 62219, 62230, 62231, 62245, 62250, 62252, 62253, 62265, 62293, 62801. Every code begins with 6, which is assigned to the central Midwest (Illinois, Kansas, Missouri and Nebraska). A ZIP code can cross county lines, so a code listed here may also serve addresses in a neighboring county. Use the ZIP code lookup to check a single code, or read how ZIP codes work.
Which counties are near Clinton County?
The closest counties by distance between the average locations of their places are listed below. The distance is a rough guide to how close the areas are, because county shapes vary widely.
- Washington County, IL — about 17 miles southeast (center to center), 7,388 people in listed places
- Bond County, IL — about 22 miles north (center to center), 9,319 people in listed places
- Marion County, IL — about 25 miles east (center to center), 30,236 people in listed places
- St. Clair County, IL — about 28 miles west (center to center), 208,781 people in listed places
- Madison County, IL — about 31 miles northwest (center to center), 272,582 people in listed places
- Perry County, IL — about 38 miles south (center to center), 13,199 people in listed places
What does the FIPS code 17027 mean?
The first two digits, 17, identify Illinois, and the last three, 027, identify Clinton County inside that state. Government datasets use this code to join records without confusing counties that share a name. Our guide to counties and FIPS codes explains the numbering, and the Illinois hub lists every county we cover in the state.
Where to go next
Combined place populations are estimates from a compiled dataset and are not official county totals.