Erik Reitzel (10 May 1941 – 6 February 2012) was a Danish civil engineer who started work in 1964 and was for many years a professor at the Royal Danish Academy of Fine Arts and at the Technical University of Denmark, in the disciplines of bearing structures and structural design.

His research enabled him to discover the fundamental correlation between fracture, minimal structures and growth. This discovery makes it possible to obtain considerable savings in construction materials. Erik Reitzel is the author of books and articles on the outcomes of his research and on their practical application.

Several prizes have been awarded to Erik Reitzel in Denmark and abroad for his research and work on architectural minimal structures, as well as for interesting and original solutions to major engineering projects. It was for this reason that he was awarded the Légion d’honneur at the request of French President François Mitterrand. In 1988 he was awarded the Nykredit Architecture Prize.

Since 1971, Erik Reitzel, in partnership with his wife Inge Reitzel, has been a consultant engineer.