Located in the southern part of the county, it borders the following townships: •
Neave Township - north •
Van Buren Township - northeast corner •
Twin Township - east •
Harrison Township, Preble County - southeast corner •
Monroe Township, Preble County - south •
Jefferson Township, Preble County - southwest corner •
Harrison Township - west •
Liberty Township - northwest corner Two incorporated villages are located in Butler Township:
Castine in the southeast, and part of
New Madison in the west. The
unincorporated community of
Otterbein lies in the township's southwest. ==Name and history==