Robertsdale is an unincorporated community in Wood Township in southern Huntingdon County, Pennsylvania, United States. It is situated on Broad Top Mountain near the eastern slope. It was founded in 1872 as part of the construction of the East Broad Top Railroad and Coal Company as the original terminus and mining location. The town was created by the EBT's parent company, the Rockhill Iron and Coal Company, which operated most of the mines on the east side of the Broad Top Coal field. The initial focus of mining was the Houk Mine which predated the town, though as a much smaller producer. Later RI&C #5 became a large producer. Mines #2, #3 and #4 were in Robertsdale but were not large producers and operated only briefly. Later the EBT was extended to Woodvale, Alvan and new Alvan as the focus of mining moved along the coal seams, though Robertsdale remained the mining headquarters.