Malvina Claire McLaughlin, 15, of the 500 block of Main Street in Schwenksville, was last seen by family members around 2:15 a.m. on June 18th.
Police say McLaughlin has known ties to Philadelphia.
A friend reported seeing her at a hotel near Independence Hall between 8:00 a.m. and 9:00 a.m. on June 18th.
Anyone with information on her whereabouts is asked to call Pa. State Police at 610-410-7844 or 610-584-1250 and reference incident number K03-1716089.