Isaac Parrish (* March 1804 in St. Clairsville, Ohio; † August 9, 1860 in Parrish City, Iowa ) was an American politician. Between 1839 and 1841, and again from 1845 to 1847, he represented the state of Ohio in the U.S. House of Representatives.
Isaac Parrish lived first in Cambridge. After studying law and admitted to the bar he began to work in this profession. In 1833 he was prosecutor in Guernsey County. At the same time he proposed as a member of the Democratic Party launched a political career. In 1837 he was a deputy in the House of Representatives from Ohio. In the congressional elections of 1838, Parrish was in the eleventh electoral district of Ohio in the U.S. House of Representatives in Washington DC chosen, where he became the successor of James Alexander on March 4, 1839. Since he has not been confirmed in 1840, he was initially able to do only one term in Congress until March 3, 1841.
In the 1844 elections Parrish was elected to Congress again in the 13th district of his state, where he Perley B. Johnson replaced on March 4, 1845. After he had renounced in 1846 on another candidacy, he was able to spend only one term in the U.S. House of Representatives until March 3, 1847. This was marked by the events of the Mexican-American War. After his time in the U.S. House of Representatives Parrish practiced as a lawyer again. He was also active in the real estate industry. He also worked in the freight business with steamboats on the Mississippi. He also founded the newspaper Harrison County flag, which appeared in Calhoun (Iowa). He died on August 9, 1860 in Parrish City.