Amboy Township is one of the twelve townships of Fulton County, Ohio, United States.

1,219 of the residents lived in the unincorporated portions of the township in 2010.

Located in the northeastern corner of the county along the Michigan border, it borders the following townships: The village of Metamora is located in northeastern Amboy Township, and the unincorporated communities of Ai and Assumption lie in the township's south.

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.