Palos Township is one of thirty townships in Cook County, Illinois, USA. As of the 2010 census, its population was 54,615. In 1850 the small town of Trenton, Illinois, changed its name to Palos. This recommendation was made by M.S. Powell, the local postmaster, whose ancestor supposedly sailed with Christopher Columbus from Palos de la Frontera. When it incorporated as a Village in 1914, Palos officially became Palos Park. The neighboring communities of Palos Hills and Palos Heights incorporated at later points. All three municipalities lie within Palos Township.