Haydentown is an unincorporated village which is located on Route 857 in Fayette County, Pennsylvania in the United States.

John Hayden came to Fayette County, Pennsylvania in 1778, after serving for six months in the Revolutionary War.

There were a few Scotch settled just west of the trading post called Hardbargain.

Unable to burn the limestone, he took a portion of it to the blacksmith shop, and discovered that it was high quality iron ore.[2][3] Hayden subsequently was appointed as a captain of a militia company that was raised in the three settlements of Berlin, Georgetown and Hardbargain to drive Indigenous people of the region north and west.

Because all related land records were destroyed in the War of 1812, and because the United States Congress never passed legislation giving Hayden the right to dispose of his land, only a tract that he donated for the Hayden Cemetery was subsequently honored.