Piatt County, IL ZIP codes
There are 11 ZIP codes in Piatt County, IL, in 11 towns, from 61813 to 61936. The largest are 61856 (Monticello), 61813 (Bement) and 61818 (Cerro Gordo).
The county seat is Monticello.
- ZIP codes
- 11
- Towns
- 11
- County seat
- Monticello
- County FIPS
17147- State
- Illinois
- Population
- 16,695
- Median household income
- $94,811
- Land area
- 439 sq mi
- Metro area
- Champaign-Urbana
Piatt County ZIP codes by town
- Monticello (county seat)
- 61856
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Piatt County ZIP codes
The ZIP codes of Piatt County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Piatt County in numbers
About 16,695 people live in Piatt County, in 6,924 households, the 63rd most populous of Illinois's 102 counties. The median household income is $94,811 a year, 14% above the Illinois median of $83,390 (US: $80,734). The median owner-occupied home is valued at $180,600 (31% below the Illinois median), and median gross rent is $1,046 a month. The median age is 42.8; 32.9% of adults 25 and over hold a bachelor's degree or higher (37.8% across Illinois); the average commute takes 24 minutes.
| Population | 16,695 |
|---|---|
| Households | 6,924 |
| Median age | 42.8 |
| Median household income | $94,811 |
| Median home value | $180,600 |
| Median gross rent | $1,046 |
| Bachelor's degree or higher | 32.9% |
| Mean commute | 24.0 min |
| Population density | 38 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Piatt County
| Town | ZIP codes | Population |
|---|---|---|
| Monticello | 1 | 6,304 |
| Bement | 1 | 1,792 |
| Cerro Gordo | 1 | 1,349 |
| Atwood | 1 | 1,144 |
| Mansfield | 1 | 866 |
| Hammond | 1 | 617 |
| De Land | 1 | 448 |
| Cisco | 1 | 234 |
| La Place | 1 | 170 |
| White Heath | 1 | 163 |
| Milmine | 1 | 24 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Piatt County.
- Champaign County (33)
- McLean County (31)
- Macon County (18)
- Douglas County (7)
- De Witt County (8)
- Moultrie County (5)
Not sure you are in Piatt County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Piatt County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
61813 | Bement , IL | Standard | 2,043 | $84,063 | $103,800 |
61818 | Cerro Gordo , IL | Standard | 1,560 | $84,375 | $116,100 |
61830 | Cisco , IL | Standard | 510 | $67,232 | $160,700 |
61839 | De Land , IL | Standard | 558 | $56,389 | $92,500 |
61854 | Mansfield , IL | Standard | 1,299 | $86,705 | $165,600 |
61855 | Milmine , IL | Standard | 24 | — | $220,000 |
61856 | Monticello , IL | Standard | 8,226 | $103,559 | $230,900 |
61884 | White Heath , IL | Standard | 973 | $106,250 | $258,300 |
61913 | Atwood , IL | Standard | 1,300 | $65,500 | $128,700 |
61929 | Hammond , IL | Standard | 672 | $79,167 | $106,800 |
61936 | La Place , IL | Standard | 170 | — | $86,800 |
Cite this page
zipcodes.pro. “Piatt County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/il/county/piatt
Underlying data is public domain or openly licensed — sources, vintages and licences.