Duplessis

Duplessis may refer to:


 * Duplessis (surname)
 * Maurice Duplessis (1890–1959), the 16th premier of Quebec
 * Duplessis (TV series), a historical television series about Maurice Duplessis that aired in Québec in 1978
 * Duplessis Orphans scandal
 * Duplessis (provincial electoral district), provincial electoral district in Quebec, Canada
 * Duplessis, Louisiana, an unincorporated community in the United States