Ocosta Junior Senior High School, commonly known as Ocosta or Ocosta High School, is a public junior and senior high school located in Westport, Washington, and is part of the Ocosta School District. The high school mascot is the Wildcat. The school teaches grades 7–12.

As of the 2022–23 school year, the school had an enrollment of 243 students and 16.3 classroom teachers (on an FTE basis), for a student–teacher ratio of 14.9:1. There were 134 students (55.1% of enrollment) eligible for free lunch and 16 (6.6% of students) eligible for reduced-cost lunch.^[1]