The crash involving a Parkland School District bus happened Thursday morning in South Whitehall Township, just outside Allentown.
A spokeswoman for the Cetronia Ambulance Corps says the bus driver and the driver of a second vehicle involved were also taken to the hospital to be checked out.
A school district official says there were only four students on the bus, and that they were nonpublic school students. Diane Foley, a secretary for Assistant Superintendent Rodney Troutman, says the students are fine.
South Whitehall Township police are investigating. A message left for the department was not immediately returned.