Namesakes
Hall-of-Famers:
1 baseball
(baseball) Chuck Klein 1980 
Nobel Prize Winners:
1 economics
(economics) Lawrence Klein 1980
Notable Actors and Actresses:
1 actor, 1 model/actress
Barbi Benton (a.k.a. Klein) 1950-
Chris Klein 1979-
Notable Artists:
1 fashion designer
Calvin Klein 1942-
Notable Athletes:
1 baseball, 1 gymnastics, 1 soccer
(baseball) Chuck Klein 1904-1958
(gymnastics) Jackie Klein 1937-
(soccer) Florian Klein 1986-
Olympic Medalists:
2 silver, 1 bronze, 1 bronze/silver, 1 gold, 1 gold/bronze
(gold/bronze) Roelof Klein 1900 rowing
(bronze) Herbert Klein 1952 swimming - 200 m breaststroke
(silver) Helga Klein 1952 4x100 m relay
(bronze/silver) Hans-Joachim Klein 1964 swimming - 100 m freestyle; swimming - 4x100 m freestyle relay; swimming - 4x100 m medley relay; swimming - 4x200 m freestyle relay
(gold) Noeki Klein 2008 water polo
(silver) Sascha Klein 2008 diving