Mifflinburg, Pennsylvania — Mifflinburg is a borough in Union County, Pennsylvania. It sits in the Susquehanna River Valley and is located about 25 miles southwest of Williamsport. The town has been part of the region since 1792 and served as the county seat when Union County was established in 1813.This page organizes FFL dealer listings associated with Mifflinburg, Pennsylvania within the directory’s location hierarchy. Visitors can keep browsing focused on the named place, move through its surrounding geography, and open individual listings for record-specific information. The page remains centered on the location itself while the catalogue can change independently. Use the hierarchy to return to broader place pages or continue toward a more specific community. Each step keeps the browsing path anchored to a named place and its surrounding geographic context.