John Lloyd Broome (1824 in New York City – 1898 in Binghamton, Broome County, New York) was an officer in the United States Marine Corps during the American Civil War.
He was the grandson of John Broome, Lieutenant Governor of New York. He was commissioned a Second Lieutenant in the Marine Corps on January 12, 1848. His 40 years of service included action at Veracruz, Alvarado, and Laguna del Carmen, Mexico, (1848).
He was promoted to First Lieutenant on September 28, 1857 and to captain on July 26, 1861 - shortly after the outbreak of the American Civil War.
During the Civil War he served as senior Marine officer of the West Gulf Blockading Squadron, he played a prominent part in the capture of New Orleans and all engagements of the Squadron on the Mississippi River. He was twice wounded; severely, at the second Battle of Vicksburg.
He received the first of two brevets (honorary promotions) to major on April 24, 1862, for gallant and meritorious services. He second brevet, to lieutenant colonel, on March 14, 1864, was for gallant and meritorious services at the second Battle of Vicksburg to date from 15 July, 1863. He was promoted to major on December 8, 1864.
After the war, the became an Original Companion of the Military Order of the Loyal Legion of the United States. He was promoted to lieutenant colonel on March 16, 1879.
Lieutenant Colonel Broome retired from the Marine Corps on March 8, 1888. In 1890 he became a Veteran Member of the Aztec Club of 1847. He died on April 12, 1898 at Binghamton, where he was buried.