Newton Township is a township in Harvey County, Kansas, United States. As of the 2000 census, its population was 1,950.
Newton Township covers an area of 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 one airport, the Newton City-County Airport is located three miles east of the city of Newton.