The Matthias Smock House is a historic house located at 851 River Road in the township of Piscataway in Middlesex County, New Jersey, United States.

[3] The house was added to the National Register of Historic Places on December 4, 1973, for its significance in architecture.

[4] It was listed as a contributing property of the Road Up Raritan Historic District in 1997.

[5] Built by Matthias Smock in 1720, it is the earliest documented house in the county.

As stated in the nomination form: "it represents a carefully preserved and authentically restored example of early Dutch colonial architecture".