Bank

Banks are financial institutions dedicated to the business of receiving money on current or deposit account, paying and collecting cheques drawn by or paid in by customers and the making of advances to customers.

Fallout 3
There are a total of five banks throughout Washington, D.C.. All of them have no interior:
 * One bank with a blue sign in Mason District South.
 * One bank with a green sign just outside of the park in Mason District.
 * One bank with a red sign beside a highway overpass in Takoma Park.
 * One bank with a red sign in Pennsylvania Avenue, just off the Metro Central.
 * A large, unique bank with a rusted sign reading "Burnside Bank & Loan" in Dupont Circle's main area.

Point Lookout

 * The People's Bank of Point Lookout in the Point Lookout add-on has an accessible interior and is related to the quest The Velvet Curtain.

Fallout 4

 * Bridgeway Trust, a small bank in the Fens.
 * Commonwealth Bank, a bank in a skyscraper in the Financial District.
 * Commonwealth Savings and Loan, a mentioned-only bank somewhere in the Commonwealth.
 * Concord Savings and Loan, a bank in Concord.
 * Lexington Bank, a bank in the city of Lexington.
 * University Credit Union, a bank in University Point.
 * Weatherby Savings & Loan, a collapsed bank under the USS Constitution in Charlestown.

Fallout 76

 * Unnamed bank in Morgantown accessed during Back on the Beat, designated Responders stash M-3.
 * A second unnamed bank in Morgantown, to the south of Vault-Tec University. It can be entered, but contains only minor loot.
 * An unnamed bank in Point Pleasant, just south of the Mothman Museum.
 * New Appalachia Bank, located among the buildings at the New Appalachian Central Trainyard.