Franklin High School is a public high school in Seattle, Washington, located in its Mount Baker neighborhood and administered by Seattle Public Schools.

As of the 2014–15 school year, the school had an enrollment of 1,315 students and 65.1 classroom teachers (on an FTE basis), for a student–teacher ratio of 20.2:1. There were 676 students (51.4% of enrollment) eligible for free lunch and 206 (15.7% of students) eligible for reduced-cost lunch.