There are a lot of legends surrounding this name. The town was originally known as Reeseville. Some say the town was named for King Frederick of Prussia who was a supporter for the American Colonies during the Revolutionary War. Another legend says a local tavern and inn owner from Reeseville by the name of Jimmy Berry named the town. During the Revolutionary War, Berry was a British sympathizer but a shrewd businessman. When Berry heard there were wealthy Prussian troops with George Washington at Valley Forge, he hung a “King of Prussia” sign out on his establishment welcoming the Prussians to come and spend their money with him. The innn became known as the King of Prussia Inn located in Reeseville. Later, early surveyors mistakenly looked at the large sign on the inn and recorded “King of Prussia” as the name of the town instead of Reeseville.