Jacob Aaron Cantor (born December 6, 1854) was a Democratic member of the United States House of Representatives from New York. He represented New York’s 20th Congressional District as a Representative during the early twentieth century. His service in Congress places him among the historical members of the U.S. House from the state of New York.

Cantor served a single term in the House of Representatives, holding office from April 7, 1913, to March 3, 1915. During this period, he sat as a Democratic Representative for New York’s 20th District. His tenure in Congress concluded after this one term, and he is recorded as a former officeholder. Further details about his committee assignments, congressional office, or subsequent public roles are not provided in the available record.