Weathersfield Township is one of the twenty-four townships of Trumbull County, Ohio, United States.

The 2020 census found 24,689 people in the township.> Located in the southern part of the county, it borders the following townships and municipalities: Several populated places are located in Weathersfield Township: It is the only Weathersfield Township statewide.

The township is governed by a three-member board of trustees, who are elected in November of odd-numbered years to a four-year term beginning on the following January 1.

There is also an elected township fiscal officer,[5] who serves a four-year term beginning on April 1 of the year after the election, which is held in November of the year before the presidential election.

Vacancies in the fiscal officership or on the board of trustees are filled by the remaining trustees.