Allen Thomas (December 14, 1830 – December 3, 1907) was a Confederate States Army brigadier general during the American Civil War (Civil War). He was born in Howard County, Maryland and became a lawyer but he moved to Louisiana in the later 1850s and became a planter and colonel in the Louisiana militia. After the war, he was a planter, Presidential elector in 1872 and 1880, professor of agriculture at Louisiana State University and coiner at the United States Mint at New Orleans, Louisiana. He moved to Florida in 1889. Between 1894 and 1897, he was United States Minister to Venezuela. He moved to Mississippi in 1907 and died there in that year. He was buried at Donaldsonville, Louisiana.