Harmon Killebrew 523 Feet
The longest ever recorded home run was Teddy Williams which was 502ft.
Ted William's longest home run in Fenway Park was 502 feet, but I don't know if that was his longest home run ever.
643 feet hit by wille mays
465 feet long
565 feet, Mickey Mantle at Yankee Stadium.
Mickey Mantle. Check out the link for his ten longest home runs. http://www.themick.com/10homers.html
Albert Pujols hit the longest home run out of Busch stadium in 2011. The home run was 465 feet.
The longest home run was made by Ryan Howard. 536 ft.
Mo Vaughn 505 Feet
ted Williams 502 ft