Andrew Haswell Green (October 6, 1820 – November 13, 1903) was a significant American lawyer, city planner, and civic leader, often referred to as the "Father of Greater New York" for his transformative contributions to the city. His efforts were pivotal in creating Central Park alongside Frederick Law Olmsted and Calvert Vaux. He played a key role in consolidating the Tilden, Lenox, and Astor libraries into the New York Public Library, establishing institutions like the Bronx Zoo and the American Museum of Natural History, and saving New York City Hall from demolition. Perhaps his most notable achievement was the consolidation of New York City with surrounding areas, resulting in the creation of the City of Greater New York in 1898. Green's legacy continues to shape the city's landmarks and institutions, benefiting generations of New Yorkers. Despite his substantial impact, he remains relatively unknown to many.