The 2020 census found 1,814 people in the township.

The villages of Holiday City, the smallest village in Williams County, is located in northwestern Jefferson Township, as is a small part of the village of Montpelier.

[4] It is one of twenty-four Jefferson Townships statewide.

[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.