Mary Mannering (born Florence Friend; April 29, 1876 – January 21, 1953) was an English actress.

In the United States, she began playing as "Mary Mannering" (the maiden name of her father's mother).

Mannering's American debut, in the title role in Henry V. Esmond's The Courtship of Leonie, was at Daniel Frohman's original Lyceum Theatre on December 1, 1896.

Other plays with the Lyceum company included Sydney Grundy's The Late Mr. Castello on December 14, 1896, Frances Hodgson Burnett and George Fleming's The First Gentleman of Europe, Louis N. Parker's The Mayflower, and Arthur Wing Pinero's The Princess and the Butterfly (all 1897), The Tree of Knowledge by R.C.

She married James K. Hackett, the Lyceum company's leading actor, on May 2, 1897, though the marriage was not announced until January 1898.