J. C. Harmon is a part of
Kansas 6A classification. The school offers many sports and activities, including: volleyball, boys and girls basketball, football, wrestling, baseball, softball, boys and girls soccer, bowling, track and field, golf, cross country, Scholar's Bowl, forensics, debate, robotics, and choral music. J. C. Harmon High School athletes hold two
Kansas State High School State track and field records in events that were later discontinued. Ron Talley set the 880 yard run record in 5A boys track and field in 1974 with a time of 1:56.1. Jeff Smith set the 100 meter low hurdles record in 6A boys track and field in 1979 with a time of 14.3. ==Notable alumni==