In 1974, he helped to establish what later became the Cuyahoga Valley National Park, and served on the House Judiciary Committee that held the impeachment hearings against President Richard Nixon.

John Frederick Seiberling (1888–1962) and Henrietta McBrayer Buckler (1888–1979), had been wed on October 11, 1917, in Akron, Ohio.

His paternal grandparents were Frank Seiberling, the founder of Goodyear Tire and Rubber Company, and Gertrude Ferguson Penfield.

Running on an anti-Vietnam War platform, he then defeated 10-term Republican William H. Ayres by 12 points in a major upset.

He participated in the 1975 Congressional delegation meetings in the Middle East that helped precipitate the 1979 Israel-Egypt Peace Treaty.

[2] Seiberling is noted for helping effectively double the size of the United States National Park System via the 1980 Alaska Lands Act, adding approximately two-hundred million acres during his sixteen-year tenure in congress.

Known as the "Founding Father" of the Cuyahoga Valley National Park, Seiberling worked tirelessly during his sixteen-year tenure in congress to fulfill a childhood dream of establishing the Cuyahoga Valley as a protected part of the National Park System.

His mother, Henrietta Buckler Seiberling, was a seminal figure in Alcoholics Anonymous' founding and core spiritual ideals.