Morton, John (1724?–1777), an American patriot and a signer of the Declaration of Independence. He was born in Chester (now Delaware) County, Pennsylvania. Morton worked for some years as a surveyor and served for many years in the provincial assembly of Pennsylvania. He was an advocate of the rights of the colonies and in 1765 was a member of the Stamp Act Congress.
In 1774 Morton was appointed a judge of the supreme court of Pennsylvania. He was a delegate to the Continental Congresses, 1774–77. When the other Pennsylvania delegates were divided equally on the question of the Declaration of Independence, Morton cast the deciding vote in the delegation. He helped frame the Articles of Confederation.