Lewis J. Martin (February 22, 1844 – May 5, 1913) was an American lawyer and Democratic Party politician who briefly represented New Jersey's 6th congressional district in the United States House of Representatives in 1913.

Martin was born near Deckertown (now Sussex, New Jersey) on February 22, 1844.

He studied law, was admitted to the bar in 1867 and commenced practice in Branchville, New Jersey.

Martin served as attorney to the Board of Chosen Freeholders of Sussex County from 1896 to 1911, when he was appointed county judge by Governor of New Jersey Woodrow Wilson and served until his death.

He was elected as a Democrat to the Sixty-third Congress and served from March 4, 1913, until his death in Washington, D.C. on May 5, 1913.