Alexander Eaton Kruger (born 18 November 1963) is a male retired decathlete from England who competed at the 1988 Summer Olympics and the 1992 Summer Olympics.

Kruger, born in West Germany, was a competent high jumper and won the 1984 UK Athletics Championships before switching to utilise his all-round ability to compete in decathlon. He twice finished runner-up at the 1987 AAA Championships and the 1988 AAA Championships. Shortly afterwards he represented Great Britain at the 1988 Olympic Games in Seoul.

Kruger became the British decathlon champion after winning the British AAA Championships title at the 1989 AAA Championships held in Stoke-on-Trent and the following year represented England placing fourth at the 1990 Commonwealth Games in Auckland, New Zealand

Kruger regained the AAA title at the 1992 AAA Championships before representing Great Britain at the 1992 Olympic Games in Barcelona. He represented England at the 1994 Commonwealth Games in Victoria, Canada.

Kruger set his personal best (8,131 points) in the men's decathlon in 1995 before winning a third AAA title at the 2000 AAA Championships.