| Ephrata Senior High School | |
| Picture Caption: | Ephrata Mount athletic logo |
| District: | Ephrata Area School District |
| Fundingtype: | Public |
| Schooltype: | Secondary |
| Streetaddress: | 803 Oak Boulevard |
| City: | Ephrata, Pennsylvania |
| County: | (Lancaster County) |
| Postcode: | 17522 |
| Country: | USA |
| Principal: | Scott Galen [1] |
| Enrollment: | 1,268 (2018–19)[2] |
| Yearbook: | The Cloisterette[3] |
| Ratio: | 17.37 |
| Staff: | 73.00 (FTE) |
| Mascot: | Mountaineer |
| Colors: | Purple and gold |
Ephrata High School is a sub-urban/urban, public secondary school in the Ephrata Area School District located in Ephrata in Lancaster County, Pennsylvania, United States.
Washington Educational Center is on Marshall Street in Ephrata Borough. It opened in October 1999, in the vacant former Washington Elementary School, as an alternative for students who could not complete the requirements of a traditional brick-and-mortar education. In 2011, the school board changed the classification of the school to a second high school in the school district. The new status means that, upon successful completion or requirements, students receive an Ephrata High School diploma.
The district offers a wide variety of clubs, activities and sports. The school's marching band was ranked in the top 10 best schools in the nation in 2014.