The Reverend Jacob Duché (1737–1798) was a Rector of Christ Church in Philadelphia, Pennsylvania, and the first chaplain to the Continental Congress.
Duché was born in Philadelphia in 1737, the son of Colonel Jacob Duché, Sr., later mayor of Philadelphia (1761–1762) and grandson of Anthony Duché, a French Huguenot. He was educated at the Philadelphia Academy and then in the first class of the College of Philadelphia (now the University of Pennsylvania), where he also worked as a tutor of Greek and Latin. After graduating as valedictorian in 1757, he studied briefly at Cambridge University before being ordained an Anglican clergyman by the Bishop of London and returning to the colonies.
In 1759 he married Elizabeth Hopkinson, sister of Francis Hopkinson, a signer of the Declaration of Independence.
Duché first came to the attention of the First Continental Congress in September 1774, when he was summoned to Carpenters' Hall to lead the opening prayers. Opening the session on the 7th of that month, he read the 35th Psalm, and then broke into extemporaneous prayer.
"O Lord our Heavenly Father, high and mighty King of kings, and Lord of lords, who dost from thy throne behold all the dwellers on earth and reignest with power supreme and uncontrolled over all the Kingdoms, Empires and Governments; look down in mercy, we beseech thee, on these our American States, who have fled to thee from the rod of the oppressor and thrown themselves on Thy gracious protection, desiring to be henceforth dependent only on Thee, to Thee have they appealed for the righteousness of their cause; to Thee do they now look up for that countenance and support, which Thou alone canst give; take them, therefore, Heavenly Father, under Thy nurturing care; give them wisdom in Council and valor in the field; defeat the malicious designs of our cruel adversaries; convince them of the unrighteousness of their Cause and if they persist in their sanguinary purposes, of own unerring justice, sounding in their hearts, constrain them to drop the weapons of war from their unnerved bands in the day of battle!