a member of the National Christian College Athletic Association (NCCAA), primarily competing as an independent in the West Region of the Division I level from 1991–92 to 2014–15. The athletic department offers multiple sports programs for both men and women.
Simpson competes in 19 intercollegiate varsity sports: Men's sports include baseball, basketball, cross country, golf, soccer, swimming & diving, track & field, volleyball and wrestling; while women's sports include basketball, cross country, golf, soccer, softball, swimming & diving, track & field, volleyball and wrestling; and co-ed sports include cheerleading. Club sports include co-ed bass fishing. Simpson added football in 2024 and announced plans to launch women's flag football in 2026.
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Originally, while still located in San Francisco, the school's athletes were the Knights. After the school moved to Redding, there was a conflict with nearby Shasta College, who were also the Knights. Simpson remained the Knights for the first year in …