The famous person Frank Ross McCoy is associated with one of more of the Mifflin County historic places.
Some of the country's most noteable architects helped create the Mifflin County places including DeWitt Jr. Clinton, Lawrie & Green, Holman & Simon, Daniel Ziegler, Haverstick-Borthwick Co., Albert Douglas Hill, James A. Royer, Philip Diehl, Steinbach & Billmyer Co. and G. Frank Witman. Prominent architectural styles found in Mifflin Country are Colonial Revival, Art Deco and Federal.