Located in the western part of the county, it borders the following townships: •
Jefferson Township - north •
Union Township - east •
Concord Township - southeast •
Richland Township, Clinton County - south •
Wilson Township, Clinton County - southwest •
Jefferson Township, Greene County - west •
Silvercreek Township, Greene County - northwest Two villages are located in Jasper Township:
Milledgeville in the north, and part of
Octa in the northwest. ==Name and history==