San Marcos High School may refer to:
*
San Marcos High School (San Marcos, California)
San Marcos High School is a high school in the North County city of San Marcos, California. San Marcos High School is a member of the San Marcos Unified School District and serves students from San Marcos, Vista, and Carlsbad. Out of the 4 high s ...
*
San Marcos High School (Santa Barbara, California)
*
San Marcos High School (Texas)
{{Disambig