Harry Allison Estep (February 1, 1884 – February 28, 1968) was an American politician and Republican member of the U.S. House of Representatives from Pennsylvania.

Harry A. Estep was born in Pittsburgh, Pennsylvania. He attended the public schools in Marion, Indiana, and Purdue University in Lafayette, Indiana. He graduated from the University of Pittsburgh School of Law in 1913. He was admitted to the bar in 1914 and commenced practice in Pittsburgh. He served as assistant district attorney of Allegheny County, Pennsylvania, from 1917 to 1927.

Estep was elected as a Republican to the Seventieth, Seventy-first, and Seventy-second Congresses. He was an unsuccessful candidate for reelection in 1932. He resumed the practice of law until his retirement in 1964. He died in Oakland, Pennsylvania, and is buried in Allegheny Cemetery.

• United States Congress. "Harry A. Estep (id: E000221)". Biographical Directory of the United States Congress.
• The Political Graveyard

• Harry A. Estep at Find a Grave