Sir William MacCormac, 1st Baronet, KCB, KCVO (17 January 1836 – 4 December 1901) was a notable British surgeon during the nineteenth and early twentieth centuries.

He became in this way an authority on gunshot wounds, and besides being highly successful as a surgeon was a very popular in society, his magnificent physique and temperament making him a notable and attractive personality.

After the outbreak of the Second Boer War in October 1899, MacCormac volunteered to go out to South Africa as a consulting surgeon to the forces, and from November 1899 to March 1900 he saw much active service both in Cape Colony and Natal.

[4] His assistance to the British war effort was acknowledged on his return when he was appointed a Knight Commander of the Order of the Bath (KCB) for his services.

However, Easmon turned down MacCormac's offer and position, and instead chose to serve as a medical doctor in Freetown, Sierra Leone, and the Gold Coast.

Besides treaties on surgical operations, antiseptic surgery, and numerous contributions to the medical journals, MacCormac was the author of works under the Red Cross and of an interesting volume commemorating the centenary of the Royal College of Surgeons of England in 1900.