Sir William Montagu Scott McMurdo GCB (30 May 1819 – 2 March 1894) was a British army officer who rose to the rank of general.

He saw active service in India, helped to run a military railway in the Crimean War and then managed various groups of volunteers working with the army.

He was the son of Lieutenant-Colonel Archibald McMurdo of Loch Arthur, Kirkcudbrightshire and commissioned in the 8th Foot in 1837.

The following year he was appointed director-general of the newly formed Land Transport Corps and went to Crimea to assist in running the Grand Crimean Central Railway.

After the end of the Crimean War the Land Transport Corps was converted into the Military Train in 1857 and McMurdo was made its colonel-commander.