Lennart Nilsson (1922–2017) was a Swedish scientific photographer.
Lennart Nilsson may also refer to:
Lennart Nilsson (politician) (born 1944), Swedish member of Riksdag from 1976 to 2006 Lennart Nilsson (footballer) (born 1959), Swedish midfielder and striker
See also Lennart Nilsson Award, scientific photography award founded in 1998 Lennart Nelson (1918–2006), Swedish Olympic weightlifter in 1948