Major General Sir Alexander Dickson GCB KCH FRGS (3 June 1777 – 22 April 1840)[1] was a British Army officer who served in the artillery.

Arthur Wellesley, 1st Duke of Wellington had the highest opinion of his abilities and made him the effective commander of his army's artillery during the latter part of the Peninsular War.

At the battles of Vitoria, the Pyrenees and Toulouse he directed the movements of the artillery engaged, and at the end of the war received handsome presents from the officers who had served under him, many of whom were his seniors in the army list.

He was present at Quatre Bras and Waterloo on the artillery staff of Wellington's army, and subsequently commanded the British battering train at the sieges of the French fortresses left behind the advancing allies.

For the rest of his life he was on home service, principally as a staff officer of artillery[2] with the rank of major general and title of Master Gunner St James's Park.