While COVID-19 surely played a part in reduced participation in sports at Michigan High School Athletic Association schools during the 2020-21 school year, a total of 244,012 participants continued to take part in athletics across the 28 sports for which the MHSAA sponsors postseason tournaments.

The overall MHSAA participation totals count students once for each sport in which they participate, meaning students who are multiple-sport athletes are counted more than once.

Generally, the MHSAA provides as part of its annual participation release a comparison of totals, both overall and per sport, to the previous school year. But a comparison of the 2020-21 overall participation total to that from 2019-20 cannot be considered relevant because the Spring 2020 season was canceled due to COVID-19 before the start of competition, which likely affected participation counts from those spring sports. Similarly, the Fall 2020 season saw a number of schools put some sports on hold for that year, including in the highest participation sport football, which also affected identifying participation trends in those sports. Enrollment reported by MHSAA member schools did see a 2.1-percent decrease from 2019-20, to 444,085 students overall.

The participation figures are gathered annually from MHSAA member schools to submit to the National Federation of State High School Associations for compiling of its national participation survey (although the NFHS has not compiled national surveys for 2019-20 or 2020-21 amid the COVID-19 pandemic). Results of Michigan surveys from the 2000-01 school year to present may be viewed on the MHSAA Website.

The following chart shows participation figures for the 2020-21 school year from MHSAA member schools for sports in which the Association sponsors a postseason tournament:

(A) The first number is the number of schools reporting sponsorship on the Sports Participation Survey, including primary and secondary schools in cooperative programs as of May 15, 2021. The second number indicates the number of schools that had girls playing on teams consisting primarily of boys.

(B) The second number indicates the number of additional girls playing on teams consisting primarily of boys and entered in boys competition.

The MHSAA is a private, not-for-profit corporation of voluntary membership by more than 1,400 public and private senior high schools and junior high/middle schools which exists to develop common rules for athletic eligibility and competition. No government funds or tax dollars support the MHSAA, which was the first such association nationally to not accept membership dues or tournament entry fees from schools. Member schools which enforce these rules are permitted to participate in MHSAA tournaments, which attract more than 1.4 million spectators each year.