Harmon Killebrew was known for his long distance power hitting. His longest measured home run was 520 at Minnesota's Metropolitan Stadium. He likely had longer ones that were not measured.
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.
The longest home run was made by Ryan Howard. 536 ft.
Ronnie Green of the KC Royals hit the longest home run at Fenway Park in 1987
507 feet by prince fielder
Canseco
Harmon Killebrew 523 Feet
Harmon Killebrew Harmon Killebrew's 520-foot (160 m) home run, a blast to the upper deck in deep left-center field on June 3, 1967. This was the longest homer Killebrew ever hit, and the longest ever hit in Metropolitan Stadium.
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.
The longest home run was made by Ryan Howard. 536 ft.
Ronnie Green of the KC Royals hit the longest home run at Fenway Park in 1987
The longest home run of 2009 belongs to Waldemar Balentien of the Cincinnati Reds. It was measured at 495 ft.
Home Run Derby - 1959 Harmon Killebrew vs- Mickey Mantle 1-4 was released on: USA: 30 January 1960
Home Run Derby - 1959 Rocky Colavito vs- Harmon Killebrew 1-5 was released on: USA: 6 February 1960
Justin Upton
507 feet by prince fielder
525 feet
760 ft.