Dennis Mark Hertel (born December 7, 1948) is an American politician and lawyer from Michigan.

He was admitted to the Michigan bar in 1975 and commenced practice in Detroit.

Hertel was elected as a Democrat from Michigan's 14th congressional district to the 97th United States Congress and to the five succeeding Congresses, serving from January 3, 1981 to January 3, 1993.

Since leaving the Congress he has practiced law with the firm of Johnson, Rosati, Galica, Labarge, Aseltyne, Sugameli & Field, P.C.

Hertel is now a Senior Counselor with The Livingston Group in Washington, D.C. After leaving office, he became involved in political reform efforts, including joining nine other former members of Congress to co-author a 2021 opinion editorial advocating reforms of Congress.