Pennville is an unincorporated community in northeast Sullivan County, in the U.S. state of Missouri.[1]
The community is on Missouri Route 129 approximately 14 miles northeast of Milan and eight miles south-southeast of Unionville in adjacent Putnam County.[2]
A post office called Pennville was established in 1856, and remained in operation until 1909.[3] The community most likely was named after Penn Township.[4]