| East Union High School | |
| Address: | 1700 North Union Road |
| City: | Manteca, California |
| Zipcode: | 95336 |
| Country: | United States |
| Schooltype: | Public |
| Established: | 1966 |
| Principal: | Eric Simoni |
| Ratio: | 20.39 |
| Staff: | 78.62 (FTE) |
| Enrollment: | 1,603 (2018–19)[1] |
| Colors: | Red, blue, and white |
| Mascot: | Lancer |
| Rivals: | Manteca High School, Sierra High School |
East Union High School (EUHS) is a secondary school located in northwestern Manteca, California. The school first opened in 1966 with a population of 514 students, 26 staff members and four counselors. As of 2005, East Union High School enrolls over 1,600 students annually.