Clarence Dennis Coughlin (July 27, 1883 – December 15, 1946) was an American lawyer, educator, and politician who served one term as a Republican U.S. Representative from Pennsylvania from 1921 to 1923.

Clarence Coughlin attended Wesleyan University in Middletown, Connecticut, and Harvard College.

Coughlin also served six years as a member of the commission to revise the penal code of Pennsylvania.

In 1912, Coughlin unsuccessfully ran for Congress under the Progressive Party banner, coming in ahead of incumbent Republican Charles Bowman but ultimately losing to John Casey.

[1] Coughlin was elected as a Republican to the 67th Congress, during which he served as chairman of the United States House Committee on Expenditures in the Department of Commerce.