Newton is the county seat of, and most populous city in, Jasper County, Iowa, United States. Located 30 miles (48 km) east of Des Moines, Newton is in Central Iowa. As of the 2010 Census, the city population was 15,254. It is the home of Iowa Speedway, Maytag Dairy Farms, and the Iowa Sculpture Festival.
Newton was founded in 1846 as Newton City, then shortened to Newton in 1847 and incorporated as a city in 1857. It was named to pair with Jasper County, following a common American naming scheme at the time in honor of Revolutionary War soldiers John Newton and William Jasper. In the late 19th century, Newton's growth was fueled by the development of coal mines in the region. The first significant mine in the area was the Couch mine of the Jasper County Coal and Railway Company, opened in the 1870s. It was, for a while, the largest mine in the county, producing 70 tons per day. William Snooks opened a mine near Newton in 1886.