This list of cities may not be complete If you have information about any of these unlinked communities, please send it to us and we will add a page for that community. The county is governed by a three member county commission. Named for Thomas Mifflin, first governor of the Commonwealth under the Constitution of 1790, and Revolutionary hero. As early as 1731, English traders visited the area. The first settler was Arthur Buchanan, a trader, who settled on the site of Lewistown, in 1754.
Many Indian paths criss-crossed the county.
Lewistown is on the site of a great Indian Village. Fort Granville erected in 1755, was destroyed by the French and Indians. Logan Guards were among the first defenders to reach Washington when the Civil War broke out. Reeds Gap State Park Reeds Gap State Park contains 220 acres located in the New Lancaster Valley of Mifflin County and can be reached from U.S. Route 322 from Milroy by following park signs for seven miles. It is located in Snyder, Union and parts of Centre, Mifflin, and Clinton Counties and comprises 195,624 acres of State Forest land.