Mercer County School District 404, Illinois
Mercer County School District 404 is a unified school district in Mercer County, Henderson County, and Rock Island County, Illinois, for grades Pre-K to 12. About 7,985 people live in it (2020–2024 estimate). It covers 370 sq mi (958 km²) of land.
- Population, 2020–2024 estimate
- 7,985 ± 294
- Grades
- Pre-K to 12
- Type
- Unified school district
- Counties
- Mercer County93% of the district’s landHenderson County4% of the district’s landRock Island County2% of the district’s land
- Land area
- 370 sq mi (958 km²)
- Median household income
- $66,630 ± $6,869
- Median home value
- $133,000 ± $9,807
- Water area
- 8.05 sq mi (20.8 km²)
- State
- Illinois
- Census code (GEOID)
- 1701395
- Coordinates (central point)
- 41.207345, -90.864379
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 Mercer County School District 404, largest first
- Mercer Township3,917 people
- Aledo (city)3,668 people
- New Boston Township1,113 people
- New Boston (city)648 people
- Millersburg Township588 people
- Keithsburg (city)490 people
- Keithsburg Township490 people
- Eliza Township444 people
- Abington Township433 people
- Joy (village)387 people
- Ohio Grove Township365 people
- Seaton (village)228 people
All 17
- Duncan Township215 people
- Perryton Township179 people
- Millersburg (CDP)33 people
- Eliza (CDP)0 people
- Hamlet (CDP)0 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
- Rockridge Community Unit School District 30012 mi north
- Wapello Community School District, Iowa14 mi west
- Sherrard Community Unit School District 20017 mi east
- Louisa-Muscatine Community School District, Iowa20 mi west
- United Community School District 30420 mi southeast
- Mediapolis Community School District, Iowa21 mi southwest
- West Central Community Unit School District 23527 mi south
These share a boundary with Mercer County School District 404. 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 Mercer County School District 404 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.