Chadwick-Milledgeville Community Unit School District 399, Illinois
Chadwick-Milledgeville Community Unit School District 399 is a unified school district in Carroll County and Whiteside County, Illinois, for grades Pre-K to 12. About 2,750 people live in it (2020–2024 estimate). It covers 135 sq mi (349 km²) of land.
- Population, 2020–2024 estimate
- 2,750 ± 306
- Grades
- Pre-K to 12
- Type
- Unified school district
- Counties
- Carroll County81% of the district’s landWhiteside County19% of the district’s land
- Land area
- 135 sq mi (349 km²)
- Median household income
- $69,282 ± $9,349
- Median home value
- $108,400 ± $10,076
- Water area
- 0 sq mi (0 km²)
- State
- Illinois
- Census code (GEOID)
- 1709400
- Coordinates (central point)
- 41.966629, -89.829185
These coordinates mark a central point for the district, not a school or an address. Population, income and home value: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 20, 2026.
Towns, townships and communities in Chadwick-Milledgeville Community Unit School District 399, largest first
- Wysox Township1,427 people
- Milledgeville (village)1,218 people
- Fairhaven Township860 people
- Chadwick (village)591 people
- Elkhorn Grove Township71 people
A town, township, city or borough is listed when at least half its land is in the district; a community, when its central point is. Near a district line, an address can belong to the district next door.
Bordering unified school districts, nearest first
- Sterling Community Unit District 510 mi southeast
- Morrison Community Unit School District 611 mi southwest
- Eastland Community Unit School District 30812 mi north
- Polo Community Unit School District 22213 mi east
- West Carroll Community Unit School District 31415 mi northwest
These share a boundary with Chadwick-Milledgeville Community Unit School District 399. Distances are straight lines between central points.
Before using this answer for enrollment
A district boundary doesn’t decide which school a student attends; the district’s attendance zones and rules do. Confirm the full address and grade with Chadwick-Milledgeville Community Unit School District 399 before you rely on it.
See its schools and enrollment on NCES ↗
Find the school district where you are now or find your town or township.