Lambert Cadwalader (December 1742 – September 13, 1823) was an American merchant and leader in New Jersey and Pennsylvania.

[2] The brothers' business was a success and they became more active in civic affairs, both in Philadelphia and the wider field of the colony of Pennsylvania.

[3] In 1774, he has elected to the Provincial Assembly[citation needed], and, in Philadelphia, he was appointed to the city's Committee of Correspondence.

In January 1776, Cadwalader had been promoted to lieutenant colonel of the 3rd Pennsylvania Battalion of the Continental Army.

At the beginning of the battle for the Fort, on November 15, Cadwalader was holding the old line on the Harlem Heights.

Facing two British regiments, with three more landed to their rear, the Americans were forced to withdraw to the fort.

Lambert's quick release was partly due to the consideration that his father, Dr. Thomas Cadwalader, had shown to General Richard Prescott as a prisoner of war in Philadelphia in 1776.

Early in 1777, Cadwalader was named colonel and commander of the 3rd Battalion, now called the 4th Pennsylvania Regiment.