Gardiner Greene Hubbard (August 25, 1822 – December 11, 1897) was an American lawyer, financier, and community leader.

[4] His younger brother was Charles Eustis Hubbard (1842-1928), who later became the first secretary and clerk of the Bell Telephone Company.

Hubbard also played a pivotal role in the founding of Clarke School for the Deaf in Northampton, Massachusetts.

It was the first oral school for the deaf in the United States, and Hubbard remained a trustee for the rest of his life.

To acquire such patents, Hubbard and his partner Thomas Sanders (whose son was deaf) financed Alexander Graham Bell's experiments and development of an acoustic telegraph, which led to his invention of the telephone.

In 1876, he was appointed by President Grant to determine the proper rates for railway mail and he served as a commissioner to the Centennial Exposition.

[12] In 1894, Hubbard was elected a member of the American Antiquarian Society[13] In 1846, Hubbard married Gertrude Mercer McCurdy (1827–1909), the daughter of Robert Henry McCurdy, a prominent New York City businessman,[14] and Gertrude Mercer Lee, who was the niece of Theodore Frelinghuysen, a United States Senator and former vice presidential candidate.

[15] Her brother, Richard Aldrich McCurdy, served as president of Mutual Life Insurance Company of New York.

To service his then-modern Cambridge house, Hubbard wanted gas lights, the then-new form of illumination.

On nearby Foster Street, he built smaller houses, still with modern amenities, for "the better class of mechanic."

Through his daughter Roberta, he was the grandfather of Grace Hubbard Bell (1883–1979), who was married to Granville Roland Fortescue (1875–1952), an American soldier and Rough Rider who was the cousin of Theodore Roosevelt and son of Robert Roosevelt (born while his biological father was married to his first wife but adopted by him following her death and his marriage to his mother).

[41] He was portrayed by a suitably bewhiskered Charles Coburn in the popular biopic The Story of Alexander Graham Bell (1939).

In 1890, Mount Hubbard on the Alaska-Yukon border was named in his honor by an expedition co-sponsored by the National Geographic Society while he was president.