Ellis Louis Marsalis Jr. (November 14, 1934 – April 1, 2020) was an American jazz pianist and educator. Active since the late 1940s, Marsalis came to greater attention in the 1980s and 1990s as the patriarch of the musical Marsalis family, when sons Branford and Wynton became popular musicians. Born in New Orleans, Louisiana, Marsalis was the son of Florence Marie (née Robertson) and Ellis Marsalis Sr., a businessman and social activist.Marsalis and his wife Dolores Ferdinand Marsalis had six sons: Branford, Wynton, Ellis III, Delfeayo, Mboya, and Jason. Branford, Wynton, Delfeayo, and Jason also became jazz musicians. Ellis III is a poet and photographer.

Marsalis played saxophone during high school but switched to piano while studying classical music at Dillard University, graduating in 1955. He later attended graduate school at Loyola University New Orleans. In the 1950s and 1960s he worked with Ed Blackwell, Cannonball Adderley, Nat Adderley, and Al Hirt. During the 1970s, he taught at the New Orleans Center for Creative Arts. His students have included Terence Blanchard, Harry Connick Jr., Donald Harrison, Kent Jordan, Marlon Jordan, and Nicholas Payton.