Jay Gould had two daughters (and four sons). The eldest daughter, Helen Miller Gould, was noted for her gifts to American Army hospitals and many contributions to New York University.

The younger daughter was famed for her collection of orchid plants, cared for by nine gardeners. She auctioned them off in 1945, and gave the proceeds to the Red Cross.

Lyndhurst, the Gould estate, is maintained by the National Trust for Historic Preservation.