| Office: | Member of the Maryland House of Delegates |
| Constituency: | 26th district (1979–1983), 25th district (1983–1991) |
| Term Start: | January 10, 1979 |
| Term End: | January 16, 1991 |
| Alongside: | Francis W. White (1979–1983), Lorraine M. Sheehan (1979–1983), Albert Wynn (1983–1987), Jerry E. Perry (1983–1987), Ulysses Currie (1987–1991) and Juanita Miller (1987–1991) |
| Party: | Democratic |
| Birth Date: | 9 June 1938 |
| Birth Place: | Washington, D.C., U.S. |
| Death Place: | Melbourne, Florida, U.S. |
Dennis Clifton Donaldson (June 9, 1938 – October 11, 2024) was an American politician from the state of Maryland.[1] Born in Washington, D.C., he served in the U.S. Air Force from 1960 to 1966. He served as a Democratic member of the Maryland House of Delegates, representing Prince George's County-based district 26 from 1979 to 1983 and district 25 from 1983 to 1991, serving as speaker pro tempore for the final two years.[1]
Donaldson considered a primary challenge against Congressman Roy Dyson in the 1990 cycle, receiving the endorsement of state house speaker R. Clayton Mitchell Jr., but declined to run, citing a lack of funds.[2] He did not seek re-election that year, having accepted a position as a liaison between the Maryland Department of Transportation and the state legislature.[3] He ran for a Maryland Senate seat on the lower Eastern Shore in 1994, losing to incumbent Republican J. Lowell Stoltzfus.[4] He later worked as a political consultant, founding his own company, Donaldson Consultants. He died in Melbourne, Florida on October 11, 2024, at the age of 86.[1]