Philadelphia and Pittsburgh plan to make pitches to be Amazon's second home.
Philadelphia's Democratic Mayor Jim Kenney says the city would be a "prime" location.
Kevin Acklin, chief of staff to Pittsburgh Mayor Bill Peduto, says Pittsburgh is "uniquely positioned to submit a winning bid."
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Seattle-based Amazon said Thursday it will be spending over $5 billion to build another headquarters in North America to house as many as 50,000 employees.
It wants to be near a metro area with more than a million people, have direct access to mass transit and be within 45 minutes of an international airport. It also wants a lot of room to grow and be able to attract top technical talent.
An Allegheny county executive says Pittsburgh's affordability and local talent put it in a good positon.
A city spokeswoman says Philadelphia's rapidly growing millennial talent pool makes it a great fit.