Newton Falls is a village in southwestern Trumbull County, Ohio, United States. The population was 4,557 at the 2020 census. It is part of the Youngstown–Warren metropolitan area. The city takes its name from the two sets of waterfalls within the village, each on different branches of the Mahoning River. The city is known for its notable ZIP code and for its covered bridge, which is the second oldest in the state of Ohio.