This old cemetery is located on Titusville Road in LaGrange, NY near an old farm house; the farm is called the Cornell Farm. The cemetery may be an old family cemetery for the family(ies) that lived on the farm. The property card for the parcel says it is a private cemetery of the name Van Kleek-Westervelt; both of these family names are well known in the area.
The 1980s Dutchess County Historic Resource Survey indicates the Cornell Farm was indicated on historic maps from 1867 and 1876 to be owned by someone with the last name Cornell. This survey also identifies the cemetery as the Westervelt Cemetery.
More information: Historic Resource Survey map
Location: Google Maps (41.672450, -73.871750)