Sir Charles Prestwood Lucas KCB, KCMG, (1853-1931), was a civil servant and historian of Welsh extraction.
Lucas was born at Crickhowell, Brecon, Wales. He was the grandson of Dr. Henry John Lucas (1773-1840) and Jenetta Illtyda (1776-1821) and son of Henry Lucas. His sister, Mary Anne Lucas, married the first Baron Glanusk. Lucas was educated at Winchester College and Balliol College, Oxford.