The Union Monument in Perryville is an historic monument located by the visitor center of the Perryville Battlefield State Historic Site, in the vicinity of Perryville, Kentucky, in Boyle County, Kentucky. It was built in 1928, sixty-six years after the Battle of Perryville, the bloodiest battle in Kentucky history, on October 8, 1862. There were 16,000 Union soldiers at the Battle of Perryville, with 4,276 combined killed, captured, wounded, and missing.