Mount Pleasant is an unincorporated community located along County Route 519 on the border of Alexandria Township and Holland Township, in Hunterdon County, New Jersey.

The Presbyterian church was organized c. 1752 and worshipped in a log meeting house.

By the 1880s, the community had a post office, two stores, a mill, a blacksmith and a tavern.

[4] The Mount Pleasant Historic District is a 59-acre (24 ha) historic district encompassing the community along County Route 519 (Little York–Mount Pleasant Road) and Rick Road.

It was added to the National Register of Historic Places on November 16, 1987 for its significance in agriculture, architecture, commerce, settlement, and industry.