Ann M. Johnson Stewart is an American Democratic politician, educator, and civil engineer from Minnesota. She is a member of the Minnesota Senate, representing District 45 since 2024. From 2021 to 2023 she represented District 44, which then included Plymouth, Minnetonka, and Woodland in Hennepin County in the Twin Cities metropolitan area. In 2024 she was elected to represent District 45, which contains Orono, Wayzata, much of Minnetonka, and other cities around Lake Minnetonka in western Hennepin County.