Mary Keller is the name of:

• Mary Kenneth Keller (1913–1985), computer scientist
• Mary Page Keller (born 1961), actress

• Sugar Mama (The Proud Family character)
• Sugarman, Richard
• Sugarman, Sara
• Sugarman, Sidney
• Sugarman, Stephen
• Sugar maple tree
• Sugar marketing
• Sugar Me (Lynsey de Paul song)
• Sugar, Michael
• Sugarmon
• Sugarmont (UTA station)
• Sugar Mountain (album)
• Sugar Mountain (disambiguation)
• Sugar (Nancy Sinatra album)
• Sugar 'n' Spice (band)
• Sugar Nutrition UK
• Sugar-omega-phosphate phosphohydrolase
• Sugar Palace
• Sugar palm vinegar
• Sugar (Peking Duk and Jack River song)
• Sugar (Peking Duk song)
• Sugar-phosphate phosphohydrolase
• Sugar Pine 7
• Sugar Pine Fire
• Sugar Pine Tortrix