Mifflin is a borough in Juniata County, Pennsylvania, United States. The population was 642 at the 2010 census.

Looking for travel information about Mifflin? Explore the best travel advice on Mifflin, United States. Mifflin is located at a short trip away from Baltimore a major city in United States. Add Baltimore to your vacation plan, it has an interesting bunch of activities to do on your visit like National Aquarium, Horseshoe Casino, Oriole Park At Camden Yards. Popular vacation packages of Mifflin are of 1-2 days.