Ottawa High School is a public high school located in Ottawa, Kansas, operated by Ottawa USD 290 public school district, serving students in grades 9-12. Its athletic teams, known as the Cyclones, compete in the Frontier Athletic League. The principal is Kelly Whittaker, the assistant principal is Johnny Lewis, and the athletic director is Shawn Phillips. The current enrollment of the school is approximately 689 students, and the school has 102 teachers, secretaries, paras, and nurses. Ottawa Middle School is its main feeder school.

Ottawa is a city in, and the county seat of, Franklin County, Kansas, United States. It is located on both banks of the Marais des Cygnes River near the center of Franklin County. As of the 2020 census, the population of the city was 12,625. It is the home of Ottawa University.