Lewis Morris Jr. (September 23, 1698 – July 3, 1762) was an American judge, politician and landowner who served as speaker of the New York General Assembly from 1737 to 1738.

His father was very prominent in public life and variously served as Chief Justice of New York and as the 8th Colonial Governor of New Jersey.

[4] Lewis is considered "representative of those colonial-born politicians who came to dominate public life in eighteenth-century British America, during a time of frenetic colonial economic and demographic growth.

During his twenty-four year tenure as New York's vice-admiralty judge, he personally condemned more than 260 prize ships captured by colonial privateers, worth over £2 million.

After his death, Governor Robert Monckton appointed his son Richard to his place on the New York Court of Vice-Admiralty.