Benjamin William Arnett (March 6, 1838 – October 7, 1906) was an American educator, minister, bishop and member of the Ohio House of Representatives.

In his youth, Arnett lost a leg to an infection sustained after an ankle injury while working on a steam boat between 1857 and 1858.

[6] In 1886, as Republican representative from Greene County in the Ohio General Assembly, Arnett introduced legislation to repeal the state's "Black Laws," which limited the freedom and rights of African-American residents.

A forceful and compelling speaker, Arnett was influential in Republican politics, thanks, in part, to his friendship with fellow legislator (and later president), William McKinley.

His great-grandson, Right Reverend Benjamin Terwood Douglass of Cleveland, Ohio, is the Seventh Bishop elevated in the Pentecostal Churches of Christ.