Born in St. Paul, Minn., Lange started his career as a radio broadcaster at age 15, when he won an audition to do a weekly sports report for a local station.
Later, he attended the University of Minnesota and then served in the Marines for three years before moving to San Francisco and breaking into television in 1962, when he joined The Tennessee Ernie Ford Show as a sidekick.
Lange gained national fame after hosting The Dating Game, and went on to host other game shows including Hollywood Connection, Bullseye and $100,000 Name That Tune. His love of radio endured, however, and he also worked as a deejay in California.
Lange is survived by a sister, five children, two stepchildren and four grandchildren, the AP reports.