Madison is the capital of the U.S. state of Wisconsin and the seat of Dane County. As of July 1, 2019, Madison's estimated population of 259,680 made it the second-largest city in Wisconsin by population, after Milwaukee, and the 81st-largest in the United States. The city forms the core of the Madison Metropolitan Area which includes Dane County and neighboring Iowa, Green, and Columbia counties for a population of 654,230. Madison, which is named for US Founding Father James Madison, is home to eight National Historic Landmarks, including one UNESCO World Heritage Site.