| Clement A. Riley | |
| Office: | Massachusetts Registrar of Motor Vehicles |
| Predecessor: | Rudolph King |
| Successor: | James R. Lawton |
| Term Start: | November 30, 1957 |
| Term End: | 1963 |
| Birth Date: | 20 November 1905 |
| Death Place: | Norwood, Massachusetts |
| Alma Mater: | Boston College |
| Party: | Democrat |
| Residence: | Norwood, Massachusetts |
Clement A. Riley (November 20, 1905 – May 31, 1988) was a Massachusetts politician who served as the Massachusetts Registrar of Motor Vehicles from 1957 to 1963.
A nine-year member of the Norwood Board of Selectmen, Riley was appointed to the Civil Service Commission by Governor Paul A. Dever in 1951. In 1954 and 1956, Riley was a candidate for Treasurer and Receiver-General of Massachusetts. He lost in the Democratic primary both times to John Francis Kennedy. In 1957, Foster Furcolo appointed him to replace Rudolph King as Registrar of Motor Vehicles.[1] Riley was a candidate for Governor of Massachusetts in 1962; losing the Democratic nomination to Endicott Peabody.[2]