JPMorgan Chase's Jamie Dimon has big expansion plans, and Twin Cities likely a target (gallery)

If JPMorgan Chase & Co. is serious about expanding to new markets, the Twin Cities could be in the bank’s crosshairs.

CEO Jamie Dimon was in Boston last week to celebrate the opening of the megabank’s first retail branch in Massachusetts. While there, he was asked to identify markets Chase was targeting following moves earlier this year into Washington, D.C., Philadelphia and Boston.

“Get a list of the top 50 — 75 — (cities) in America, look at ones we’re not in, and assume one day we’ll…