Sand Brook is an unincorporated community located along County Route 523, Sand Brook-Headquarters & Britton Roads in Delaware Township in Hunterdon County, in the U.S. state of New Jersey.

It was added to the National Register of Historic Places on July 17, 2013, for its significance in architecture and community development.

[5] The former Sand Brook General Store was built around 1902 by Samuel F. Fauss.

The congregation was locally known as the "Moorites", after elder John P. Moore and his family.

[5][6] The small stone-walled cemetery located behind the church also contributes to the district.