Madison is a borough in Morris County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 16,937, an increase of 1,092 from the 2010 census count of 15,845, which in turn reflected a drop in population of 685 from the 16,530 counted in the 2000 census. Madison is noted for its historic railroad station. The station is located on the Morris& Essex Lines, which was one of the nation's first commuter railroads.