Isaac Parrish (March 1804 – August 9, 1860) was an American lawyer and politician who served two non-consecutive terms as a U.S. Representative from Ohio in the mid-19th century.

He resumed the practice of law and his former business pursuits in Sharon.

He was also interested in the real estate business and engaged in freighting by steamboat on the Mississippi River.

He established the Harrison County Flag, published at Calhoun, Iowa.

This article incorporates public domain material from the Biographical Directory of the United States Congress