Harold Martin Ryan (February 6, 1911 – March 8, 2007) was a politician and judge from the U.S. state of Michigan.

from the University of Detroit Law School in 1935 and admitted to the bar the same year and engaged in private practice.

Ryan served as a member of the Michigan Senate from 1949 to 1962, where he represented the 1st district, and was minority leader for the final six years.

In November 1962, Ryan was reelected to a full term in the 88th Congress, serving from February 13, 1962 to January 3, 1965.

He lived in St. Clair Shores, Michigan until his death of congestive heart failure at 96 years of age.