Daniël Johannes Stephanus "Danie" Theron, (9 May 1872 - 5 September 1900) was a Boer Army military leader.
Born in Tulbagh, Cape Colony, he was raised in Bethlehem, Orange Free State.
He is best known as the driving force behind the formation of a military bicycle corps used by the Boer Army for scouting and relaying messages.
Originally trained as a school teacher, he became a lawyer and notary with his own law firm in Krugersdorp, Transvaal Republic, and was made a Captain in the Boer Army when the Second Boer War began.
During the war, he was put in charge of a significant scouting unit, the Theron se Verkenningskorps (TVK) (Theron Reconnaissance Corps).
He fought at the Battle of Spion Kop and one of his most famous feats occurred at the Battle of Paardeberg.
The British Commander in Chief, Lord Roberts, called Theron: "the hardest thorn in the flesh of the British advance", put a reward of £1,000 on his head – dead or alive – and dispatched 4,000 soldiers to find and eliminate the TVK.