Alfred (Al) Herman Duerr (born in 1951 in Humboldt, Saskatchewan) is a former Canadian politician who served as the 34th Mayor of Calgary, Alberta from 1989 to 2001, and a city alderman from 1983 to 1989. He is the Chief Executive Officer of Emergo Projects International, and serves on the board of directors for two other companies in Calgary. He is a member of the Community and Partners Advisory Committee of the Libin Cardiovascular Institute of Alberta.
Duerr attended the University of Saskatchewan and graduated with a degree in Urban Geography and Regional Urban Development and holds a Masters of Business Administration degree from Haskayne School of the University of Calgary.
He served two terms as an Alderman in Calgary before being elected mayor in 1989. Duerr served for four terms as Calgary's mayor, leaving office in 2001, and was one of the most popular mayors in the city's history. His conciliatory, managerial style and likeable personality made him well respected.
Duerr is married to Kit Chan, and has two children.