Piatt County, Illinois ZIP codes
11 ZIP codes are in Piatt County, plus 5 that cross in from neighboring counties. It's part of the Champaign-Urbana, IL metro area.
- ZIP codes
- 11
- Population in these ZIPs
- 17,335
- Avg. median income
- $91,900population-weighted
- Cities & towns
- 11
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Piatt County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 61813 | Bement | 2,043 | $84,063 | $208,800 |
| 61818 | Cerro Gordo | 1,560 | $84,375 | $164,000 |
| 61830 | Cisco | 510 | $67,232 | $216,800 |
| 61839 | De Land | 558 | $56,389 | $178,800 |
| 61854 | Mansfield | 1,299 | $86,705 | $242,800 |
| 61855 | Milmine | 24 | — | $220,000 |
| 61856 | Monticello | 8,226 | $103,559 | $289,200 |
| 61884 | White Heath | 973 | $106,250 | $374,800 |
| 61913 | Atwood | 1,300 | $65,500 | $147,300 |
| 61929 | Hammond | 672 | $79,167 | $166,600 |
| 61936 | La Place | 170 | — | $86,800 |
ZIP codes partly in Piatt County
These ZIP codes are mostly in a neighboring county but cover part of Piatt County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 61842 | Farmer City | De Witt County | 2,620 | $80,117 | $183,800 |
| 61851 | Ivesdale | Champaign County | 279 | $59,167 | $147,900 |
| 61853 | Mahomet | Champaign County | 14,831 | $115,512 | $352,500 |
| 61875 | Seymour | Champaign County | 846 | $118,929 | $302,100 |
| 61882 | Weldon | De Witt County | 777 | $80,139 | $138,000 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Piatt County
Nearby counties
Frequently asked questions
How many ZIP codes are in Piatt County, Illinois?
11 ZIP codes are mainly in Piatt County, and 5 more ZIP codes from neighboring areas reach partly into it.
What cities are in Piatt County?
ZIP codes in Piatt County use the city names Atwood, Bement, Cerro Gordo, Cisco, De Land, Hammond, La Place, Mansfield, Milmine, Monticello and White Heath.
What metro area is Piatt County in?
Piatt County is part of the Champaign-Urbana, IL metropolitan statistical area.