The Old Dutch Parsonage is a historic house built in 1751, moved about 1913 and now located at 65 Washington Place, in the borough of Somerville in Somerset County, New Jersey, United States.

It was added to the National Register of Historic Places on January 25, 1971, for its significance in education and religion.

[1] The nomination form notes it as "an excellent example of mid-18th-century Flemish bond brick structure".

Jacob Rutsen Hardenbergh, one of the seminarians who occupied the house after Frelinghuysen's death along with the former reverend's widow and her children, succeeded Frelinghuysen as minister, occupant of the house, and, in 1756, as husband to the former Mrs.

[4] Hardenbergh helped establish Queen's College, now known as Rutgers University, in 1766 and in 1785 became its first president.