The 3rd County of London Yeomanry (Sharpshooters) was a Yeomanry regiment of the British Army. It was raised in 1901 from Second Boer War veterans of the Imperial Yeomanry. During the First World War it served dismounted at Gallipoli, was remounted to serve in Macedonia, Egypt and Palestine, before being converted to machine gunners for service on the Western Front. 2nd and 3rd Line units remained in the United Kingdom throughout.