Chelsea High School (CHS) is a public high school located in Chelsea, Michigan, United States.

The demographic breakdown of the 846 students enrolled in 2018-2019 was: 13.9% (118) of the students were eligible for free or reduced price lunch.

[1] Chelsea is a member of the Southeastern Conference and the Michigan High School Athletic Association MHSAA SEC.

It is a Class B school and competes in Division 2 in all sports except for ice hockey, men's and women's swimming and diving, football, and men's and women's tennis which are Division 3.