The siege of Mafeking was a 217-day siege battle for the town of Mafeking in South Africa during the Second Boer War from October 1899 to May 1900. The siege received considerable attention as Lord Edward Cecil, the son of the British prime minister, was in the besieged town, as also was Lady Sarah Wilson, a daughter of the Duke of Marlborough and aunt of Winston Churchill. The siege turned the British commander, Colonel Robert Baden-Powell, into a national hero. The Relief of Mafeking, while of little military significance, was a morale boost for the struggling British.

Mahikeng, formerly known as Mafikeng and alternatively known as Mafeking, is the capital city of the North West province of South Africa.