Evergreen Cemetery gatehouse (1855) is a historic building located at 799 Baltimore Pike in Adams County, Pennsylvania, United States.

During the American Civil War, the gatehouse played an important role in the July 1 to 3, 1863 Battle of Gettysburg.

Evergreen Cemetery occupies a hill just south of Gettysburg Borough, between Baltimore Pike and Tanneytown Road.

Philadelphia architect Stephen Decatur Button designed the cemetery's gatehouse in mid-1855,[2] and its cornerstone was laid by Reverend Samuel Simon Schmucker on September 1.

Howard made the cemetery's gatehouse into XI Corps (Union Army) headquarters, and occupied the building for all three days of the battle.