Newton Township is a township in Harvey County, Kansas, USA. As of the 2000 census, its population was 1,950.
Newton Township covers an area of 26.77 square miles (69.3 km2) and contains two incorporated settlements: Newton (the county seat) and North Newton. According to the USGS, it contains two cemeteries: Greenwood and Saint Marys.
Newton Township contains two airports or landing strips: Eightyone Airport and Newton City-County Airport.