| Belleville High School East | |
| Coordinates: | 38.5186°N -89.95°W |
| District: | Belleville Township High School District 201 |
| Principal: | Josh Lane |
| Faculty: | 154.40 (on FTE basis) |
| Ratio: | 16.63 |
| Enrollment: | 2,568 (2022-23)[1] |
| Grades: | 9-12 |
| Mascot: | Lancers |
| Colors: | Columbia blue and navy [2] |
| Established: | 1966 |
| Homepage: | www.bths201.org/east |
Belleville High School East is a public high school in Belleville, Illinois, United States. It is part of Belleville Township High School District. It was established in 1966.
Prior to 1966, Belleville Township School District operated only one school, Belleville Township High School, which was the old Belleville West campus (a new campus has since been built). The growth of the district prompted the local board of education to construct a new campus and divide the student body between the two schools.
The new campus was built in a college format with many different buildings. The newly commissioned Belleville Area College (now Southwestern Illinois College) occupied half of the campus while the new high school occupied the other. Enrollment in the school increased rapidly and the college was forced to move to a new location.
Major renovations were completed in 2009. These included new landscaping, more classrooms, remodeled classrooms and buildings, new lockers, and a new cafeteria.[3]
As of the 2023-2024 school year, it is the largest public high school in the St Louis region.[4]
The school established a "Lancer Wall of Fame" to recognize noteworthy alumni, faculty, support staff and community members.[7]