William Allen Montgomery (November 16, 1829 – December 5, 1905) was an American lawyer, planter and Baptist minister.

Trained as a lawyer in Tennessee, he was a cotton planter in Texas in the 1850s and served as a Confederate chaplain in the American Civil War.

William Allen Montgomery was born on November 16, 1829, in Jefferson County, Tennessee.

[1] After serving as a legal aide to E. Alexander, a judge on the Knoxville Circuit Court, Montgomery was admitted to the bar in 1851.

[1] In 1861, at the outset of the American Civil War, Montgomery voted in favor of secession, representing Washington County, Texas.

[1][2] At the end of the war, he had lost his wealth, but he was able to return to his life as a planter by working on his father-in-law's plantations in Tennessee.

[1] Montgomery served as corresponding secretary of the board of missions of the Tennessee Baptist Convention from 1877 to 1880.