Robert Joseph diGrazia[a] (February 24, 1928 – April 26, 2018)[1][2] was an American police officer who served as Commissioner of the Boston Police Department from 1972 to 1976. diGrazia grew up in San Francisco, where he graduated from Galileo High School.

[4] He worked for Macy's, rising from a part-time supply clerk to a full-time department head.

[4] In the late 1950s, he worked as a manufacturers' representative, then became a deputy sheriff in Marin County, California.

[5] In October 1976, diGrazia announced his resignation following a disagreement with White over his pay;[7] he left his role in Boston the following month.

[8] diGrazia then led the Montgomery County Police Department in Maryland until he was fired in December 1978.