Southern Maryland Athletic Conference

The Southern Maryland Athletic Conference (SMAC) is a high school athletic league in Maryland, comprising the public secondary and high schools throughout Southern Maryland. The SMAC's membership consists of the following schools located in Calvert, Charles, and St. Mary's Counties:

St. Mary's Ryken High School was a member, and the only private Maryland school in a public league, but withdrew to join the Washington Catholic Athletic Conference (WCAC) in 2002. St. Charles High School became a member of SMAC in 2014.
 * Calvert High School
 * Chopticon High School
 * Great Mills High School
 * Henry E. Lackey High School
 * Huntingtown High School
 * La Plata High School
 * Leonardtown High School
 * Maurice J. McDonough High School
 * Northern High School
 * North Point High School
 * Patuxent High School
 * Thomas Stone High School
 * Westlake High School
 * St. Charles High School