| Mai Šein | |
| Birth Date: | 10 May 1946 |
| Birth Place: | Räägi, Saaremaa, Estonia |
| Alma Mater: | National Art Institute of the Estonian SSR |
| Practice: | Tsentrosojuz Projekt Mai Šein OÜ |
Mai Šein (born 10 May 1946 in Räägi, Saaremaa) is an Estonian architect.
Mai Šein studied in the National Art Institute of the Estonian SSR (today's Estonian Academy of Arts) in the department of architecture. She graduated from the institute in 1970.
From 1970 to 1990, Mai Šein worked in the Tallinn office of the soviet design bureau Tsentrosojuz Projekt. Currently Mai Šein works in the architectural bureau Mai Šein OÜ.
Notable works by Mai Šein are the Golf Club of Tallinn in Niitvälja, the building of the Energetics department of the Tallinn Technical University, apartment building on Koidula Street and the terrace housing on the Sõpruse road. Mai Šein is a member of the Union of Estonian Architects.