The Old Third District Courthouse in New Bedford, Massachusetts, United States, is located at the corner of Second and William streets.

It was built in 1853 by Russell Warren in the Greek Revival architectural style, as the home of the New Bedford Institute for Savings, a local bank.

A small bracketed cornice tops the windows and main entrance on William Street, which is fronted by a granite balustraded porch.

When whaling declined in New Bedford, to be replaced by textiles, the bank moved to larger quarters downtown where it has remained ever since.

It had come back around to being used as a branch by Fleet Bank in 1995 when New Bedford's Waterfront Historic Preservation LEague (WHALE) bought it and turned it over to the NPS.