Ralfe Clench (ca 1762-January 19, 1828) was a farmer, judge and political figure in Upper Canada. His first name is also sometimes recorded as Ralph or Rudolf; his last name is sometimes recorded as Clinch. Clench married Elizabeth Johnson, who was the granddaughter of Sir William Johnson and Molly Brant. He died at Niagara in 1828. His son, , became an official in the Indian Department. His daughter Elizabeth Euretta married Charles Richardson.