John Wentworth Jr. (July 17, 1745 – January 10, 1787) was a Founding Father of the United States and a lawyer who served as a New Hampshire delegate to the Continental Congress, where he signed the Articles of Confederation.
Governor John Wentworth, his cousin, appointed him the probate register for Strafford County, and he held that post until his death.
Wentworth was active in the various revolutionary committees, and was elected to the convention (later the State Assembly) from Dover every year from 1776 to 1780.
His term of service gave him the chance to sign the Articles of Confederation when the Congress passed that plan to unify the colonies.
As the state established a more stable government, he was elected to the New Hampshire Senate from 1784 to 1786.