Symmes Township is located in what was originally the Symmes Purchase. The township was incorporated by an act of the General Assembly on January 19, 1822. However, its year of establishment is usually given as 1824, as seen in the township's previous logo. In 1853, the Little Miami Railroad was completed, connecting the township to Cincinnati. Symmes Township survived a 1994 attempt to merge with Loveland, as well as efforts the following year to incorporate most of Symmes and Deerfield Townships as the City of Heritage.
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. Two are elected in the year after the presidential election and one is elected in the year before it. There is also an elected township fiscal officer, 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.
Police and fire protection in Symmes Township are the responsibility of the Hamilton County Sheriff and the Loveland-Symmes Fire Department respectively.
hree different school districts include parts of the township:
- The Indian Hill Exempted Village School District serves the southern part of the township.
- The Loveland City School District serves the northeastern part of the township
- The Sycamore Community School District serves the western part of the township.
Many private schools are located near Symmes Township as well, including Cincinnati Country Day School, Cincinnati Hills Christian Academy, Archbishop Moeller High School, Ursuline Academy, St. Margaret of York Elementary School, and St. Columban School.