Jane Norton Grew (September 30, 1868 – August 14, 1925), known upon her marriage as Mrs. J. P. Morgan Jr., was an American socialite, art collector, and dilettante horticulturalist.

Grew curated and managed the Morgan library and art collection, and became involved in horticulture on her Long Island estate in Glen Cove.

[1] She was the daughter of Henry Sturgis Grew, a prominent Boston banker and mill owner, and Jane Norton Wigglesworth.

[2] On December 11 1890, Grew married John Pierpont Morgan Jr., the son and heir of the financier and banker J. P.

"[8] The family later returned to New York in 1905, residing at Glen Cove on Long Island, where Grew took interest in horticulture on the Morgan's estate.