Geography thumb|left|200px|A dairy farm near route 356 Jefferson Township is located in southeastern Butler County. The borough of Saxonburg lies along the township's southern boundary but is separate from it. The township includes the unincorporated communities of Hannahstown and Jefferson Center.
Geography thumb|left|200px|A dairy farm near route 356 Jefferson Township is located in southeastern Butler County. The borough of Saxonburg lies along the township's southern boundary but is separate from it The township includes the unincorporated communities of Hannahstown and Jefferson Center.