Calvin Goddard (July 17, 1768 – May 2, 1842) was a United States Representative from Connecticut. He was born in Shrewsbury, Worcester County, Massachusetts. He attended Plainfield Academy where he pursued classical studies, and was graduated from Dartmouth College in 1786. He studied law and was admitted to the bar in 1790 and commenced practice in Plainfield, Connecticut.
Godard was a member of the Connecticut State House of Representatives from 1795 to 1801. He was elected as a Federalist to the Seventh Congress to fill the vacancy caused by the resignation of Elizur Goodrich. He was reelected to the Eighth and Ninth Congresses and served from May 14, 1801 until his resignation in 1805 before the convening of the Ninth Congress. He again elected to the Connecticut State House of Representatives in 1807 and served as a speaker. He moved to Norwich, Connecticut in 1807 and resumed the practice of law. He was a presidential elector on the ticket of Clinton and Ingersoll in 1812, a delegate to the Hartford Convention in 1814-15, a judge of the superior court in 1815 and 1818, and mayor of Norwich from 1814-1834. He died in Norwich on May 2, 1842 and was buried in the city cemetery.