Mountainside Borough School District, New Jersey
Mountainside Borough School District is a unified school district in Union County, New Jersey, for grades K–12. About 7,049 people live in it (2020–2024 estimate). It covers 4 sq mi (10.4 km²) of land.
- Population, 2020–2024 estimate
- 7,049 ± 18
- Grades
- K–12
- Type
- Unified school district
- County
- Union County
- Land area
- 4 sq mi (10.4 km²)
- Median household income
- $211,538 ± $63,184
- Median home value
- $810,300 ± $48,757
- Water area
- 0.05 sq mi (0.12 km²)
- State
- New Jersey
- Census code (GEOID)
- 3411040
- Coordinates (central point)
- 40.680722, -74.360292
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 Mountainside Borough School District, largest first
- Mountainside (borough)7,049 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
- Springfield Township School District (Union County)1.8 mi northeast
- Westfield Town School District2.2 mi southeast
- Summit City School District2.4 mi north
- Berkeley Heights Township School District3.3 mi west
- Scotch Plains-Fanwood Regional School District3.4 mi south
These share a boundary with Mountainside Borough School District. 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 Mountainside Borough School District 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.