Donald D. Clancy (July 24, 1921 – June 12, 2007) was a Republican member of the United States House of Representatives.

In 1948, Clancy was admitted to the bar and commenced the practice of law in Cincinnati.

He served on the city council from 1952 until 1960; from 1958 until 1960 he was the mayor as well as the chairman of the Cincinnati Planning Commission.

Clancy defeated future television talk show personality Jerry Springer in his 1970 re-election campaign.

Beginning with the Eighty-seventh Congress, Clancy was elected to congressional office for eight consecutive terms.