Pleasant Plains is an unincorporated community and census-designated place (CDP)[7] located in Franklin Township, in Somerset County, in the U.S. state of New Jersey.

[12] Prior to the development of K. Hovnanian's Town and Country Estates in 1998, the area included little more than a collection of 18th and 19th century farms and rural lanes.

[15] Since the early 19th century (and possibly even earlier), the area featured a one-room schoolhouse known as the Pleasant Plains School.

Located on the north side of Suydam Road about a half mile west of Laird's Corner, it remained in use until about 1931 when the Township started decommissioning its one-room schoolhouses in favor of larger regional schools.

Moved across the road on log rollers, it was converted into a residence and used until the late 20th century when it was threatened with demolition to make way for the Town and County development.