Douglas J. Ritsema (born December 28, 1952) is an American lawyer and politician.
He completed studies in mathematics at Northwestern College in 1975 and subsequently earned a J. D. from the University of Iowa College of Law in 1978.
During law school, Ritsema was an intern at the Iowa House of Representatives in 1977.
Ritsema subsequently won a four-year term on the Iowa Senate in 1982, representing the 3rd district.
During his political career, Ritsema was affiliated with the Republican Party.