Thomas Alfred Smyth (December 25, 1832 – April 9, 1865) was a brigadier general in the Union Army during the American Civil War.

Smyth was born in Ballyhooly [Irish: Baile Átha hÚlla, loose translation:"town of the ford of the apples"-Source: Logainm.ie] in Cork County, Ireland, and worked on his father's farm as a youth.

During the Battle of Gettysburg, his men helped defend Cemetery Ridge and advanced to the area of the Bliss farm to oust enemy sharpshooters.

[1] In April 1865 near Farmville, Virginia, Smyth was shot through the mouth by a sniper, with the bullet shattering his cervical vertebra and paralyzing him.

Smyth died two days later at Burke's Tavern, concurrent with the surrender of Robert E. Lee and his army at Appomattox Court House.