New Boston is an unincorporated community in Wayne County in the U.S. state of Michigan.

As an unincorporated community, New Boston has no legally defined boundaries or population statistics of its own.

New Boston is located close to three divisions of the Huron–Clinton Metroparks system: Lower Huron, Oakwoods, and Willow.

The community has its own post office with the 48164 ZIP Code, which also serves the communities of Waltz and Willow, as well as smaller portions of Sumpter Township to the west and Brownstown Charter Township to the east.

New Boston was first settled in 1827 and was originally called "Catville" after the initials of the proprietor, C. A. Trowbridge.