Newton
- Country: United States
- State: Iowa
- Population: 15,034 (2016)
- Latitude: 41° 42' N (41.69971°)
- Longitude: 93° 2.9' W (-93.04798°)
- Elevation: 290 m/951 ft. above sea level
- Time zone: America/Chicago (UTC -06:00); DST observed (UTC -05:00)
- Alternate names: Newton City