Francis Loraine Petre OBE (22 February 1852 – 6 May 1925) was a British civil servant in India and a military historian upon his retirement. He wrote a two-volume regimental history of the Norfolk Regiment, but is best known for his works on the Napoleonic Wars. The grandson of the 11th Baron Petre, he was educated at Oscott College and joined the Bar in 1880. He took the civil service exam and subsequently joined the Indian Civil Service. He retired as Commissioner of Allahabad in 1900.