Marlon Blackwell (born November 7, 1956) is an American architect and university professor in Arkansas. He is a Fellow of the American Institute of Architects.

He is founder and principal at Marlon Blackwell Architects, a design firm established in 1992 in Fayetteville.

Blackwell is the E. Fay Jones Chair in Architecture and a Distinguished Professor in the Fay Jones School of Architecture and Design at the University of Arkansas in Fayetteville.

Marlon Blackwell was born November 7, 1956, in Fürstenfeldbruck, Germany. He grew up near Air Force bases in the Philippines, Alabama, Florida, Colorado, and Montana. He received a Bachelor of Architecture from Auburn University and a Master of Architecture II from Syracuse University (in Florence, Italy). During college, he spent five summers in the rural South as a Bible salesman for the Thomas Nelson Publishing Company. After completing his undergraduate degree, he practiced in firms in Lafayette, Louisiana, and Boston, Massachusetts. Following his graduate degree, he was a visiting professor at Syracuse University.

He has taught at the University of Arkansas in Fayetteville since 1992. He co-founded the University of Arkansas Mexico Summer Urban Studio at the Casa Luis Barragán in Mexico City and taught in the program for many years beginning in 1996. He served as head of the architecture department from 2009 to 2015.

In 1992, he founded Marlon Blackwell Architects (originally Marlon Blackwell Architect).

He authored the book An Architecture of the Ozarks: The Works of Marlon Blackwell (Princeton Architectural Press, 2006). This monograph of his design work features nine built residential and commercial projects and three residential prototypes. The book includes essays by Juhani Pallasmaa, Dan Hoffman and David Buege.

In 1994, he married Meryati Johari. They live in Fayetteville with their two children. Meryati Johari Blackwell is an architect, principal and co-owner at Marlon Blackwell Architects.