Weathersfield Township is one of the twenty-four townships of Trumbull County, Ohio, United States. The 2000 census found 27,717 people in the township, 8,677 of whom lived in the unincorporated portions of the township.GeographyLocated in the southern part of the county, it borders the following townships and municipalities: Howland Township - northVienna Township - northeast cornerLiberty Township - eastYoungstown - southeast cornerAustintown Township, Mahoning County - southJackson Township, Mahoning County - southwest cornerLordstown - westWarren Township - northwest Several populated places are located in Weathersfield Township: Much of the city of Niles, in the northThe village of McDonald, in the eastThe census-designated place of Hilltop, in the eastPart of the census-designated place of Mineral Ridge, in the south