Mai à  ein (born 10 May 1946 in Räägi, Saaremaa) is an Estonian architect.
Mai à  ein 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 à  ein worked in the Tallinn office of the soviet design bureau Tsentrosojuz Projekt. Currently Mai à  ein works in the architectural bureau Mai à  ein OÃÂ.
Notable works by Mai à  ein 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 à  ein is a member of the Union of Estonian Architects.