Total enrollment
843
-14 (-2%) vs SY 2020-21
3 schools in Seneca
Illinois · Public K-12
Across the city, Seneca hosts 3 public K-12 schools teaching roughly 843 Illinois students (about 281 per school).
4-year change in Seneca
SY 2020-21 vs SY 2024-25School count
3
0 (0%) vs SY 2020-21
Source: NCES Common Core of Data, enrollment-weighted demographic averages
Residents
2,450
all ages · ACS 5-yr
Students
843
public K-12 · NCES
Schools
3
public K-12
| Name | Level | Grades | Enrollment |
|---|---|---|---|
| Seneca Elem School South Campus | Middle | 05-08 | 209 |
| Seneca Grade School North Campus | Elementary | PK-04 | 256 |
| Seneca High School | High | 09-12 | 378 |
About Seneca
Seneca is a thinly populated Illinois city in terms of public-school footprint, with 3 schools and 843 students total.
Looking at the level breakdown, the city is built around 1 elementary, 1 middle, and 1 high.
Per-school enrollment runs near 281, below the state mean of about 480.
Trend over the past 4 years. Across the same 4-year window, public-school enrollment held roughly steady: 857 students in SY 2020-21 versus 843 in SY 2024-25.
On allk12, the community for Seneca discusses enrollment trends, district policy changes, and bus-route updates. Members of the local community share what they see day-to-day.