George Calvert Holland (28 February 1801 – 7 March 1865) was an English physician, phrenologist, mesmerist and homeopath.

His advocacy of the phrenological theories of Franz Joseph Gall and Johann Spurzheim involved him in a sharp debate with medical colleagues there, and he moved to Sheffield.

[1] In the struggle for the repeal of the Corn Laws, Holland became a protectionist, which was detrimental to his professional earnings.

He was elected a member of the town council, but lost his seat in 1858, owing to his advocacy of a Local Improvement Act.

[1] Holland's works An Experimental Enquiry into the Laws of Animal Life, Edinburgh, 1829, and The Physiology of the Fœtus, Liver, and Spleen, 1831, added to his professional reputation.