Scott H. Decker (born July 17, 1950)[1] is an American criminologist and Foundation Professor of Criminology and Criminal Justice at Arizona State University (ASU).

He is known for researching gang violence and criminal justice policy.

[4] Decker joined the faculty of the University of Missouri-St. Louis in 1977 as an assistant professor in the Department of Criminology and Criminal Justice.

In 2006, he left the University of Missouri to join the faculty at Arizona State University, where he was named a Foundation Professor in 2010 and an Honors College Professor in 2014.

From 2006 to 2014, he was the first director of Arizona State University's School of Criminology and Criminal Justice.