New Boston is an unincorporated community in central Lee County, Iowa, United States.

It lies in the southeast corner of Iowa, along U.S. Highway 218 and southwest of the city of Fort Madison, the county seat of Lee County.

The community is part of the Fort Madison–Keokuk, IA-MO Micropolitan Statistical Area.

There are no commercial establishments in New Boston, although this is the home of Liberty Baptist Church.

This article about the geography of Lee County, Iowa is a stub.