Both sides lost about a fourth of their number but, despite General McClellan's refusal to press on his attacks, it served as a tactical Union victory, as Lee was forced to withdraw from Maryland.
Ambele părți au pierdut aproximativ un sfert din efective dar, deși generalul McClellan a refuzat să-și continue atacurile, el a fost o victorie tactică a Uniunii, deoarece Lee a fost nevoit să se retragă din Maryland.