How many casualties were there in the Battle of Gettysburg?

Gettysburg was the bloodiest battle of the Civil War. It is estimated that there were at least 45,000 and possibly as many as 51,000 casualties in the two armies at Gettysburg.

How many people died at Gettysburg?

Note that the term “casualties” means not just people who were killed, but also includes men who were wounded (many of whom may have died of their wounds later), soldiers who were captured, and even men who ran away. It’s impossible to calculate an exact number because of missing or incomplete records. This estimate is one of the more conservative and probably significantly understates Confederate missing and wounded:

killed wounded missing total
Union 3,150 14,500 5,165 22,815
Confederate 4,400 12,950 5,350 22,700
Total 7,550 27,450 10,515 45,515

See a detailed table of the strength and casualties of the Army of the Potomac
or a detailed table of the strength and casualties of the Army of Northern Virginia

Were any civilians killed in the Battle of Gettysburg?

Hundreds of civilians sheltered in their homes as the fighting raged around them and one, John Burns, joined the fight and was wounded. But while a number of civilians died from the diseases the battle brought to town and several were killed by unexploded ordnance afterwards, only one civilian, Jennie Wade, was killed during the actual Battle of Gettysburg. She was struck by a stray shot while indoors in a house on the south side of town caring for a sick relative.