JPMorgan's Jamie Dimon has big expansion plans after Greater Washington. Here are the U.S. cities in his crosshairs.

JPMorgan Chase & Co. CEO Jamie Dimon has a good idea of what other cities he wants to expand to after Greater Washington.

Dimon was in Boston last week to celebrate the opening of the financial juggernaut’s first retail branch in Massachusetts when he was asked to identify what markets the bank was targeting after also making movies in Philadelphia and Boston. The bank had announced a massive $5 billion, 70-branch expansion into the D.C. region in April.

“Get a list of the top 50 — 75 — [cities]…