Brown Township is one of the eighteen townships of Delaware County, Ohio, United States.

Located in the northern part of the county, it borders the following townships: A small, uninhabited part of the city of Delaware, the county seat of Delaware County, is located in southwestern Brown Township, and the unincorporated community of Kilbourne lies in the township's east.

[5] 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,[6] 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.

Emergency medical services in Brown Township are provided by the Delaware County EMS.