Leena Katriina Lehtolainen (b. 11 March 1964, Vesanto) is a Finnish crime novelist. She has written the famous book series about the policewoman Maria Kallio.
Her first novel was released when she was only 12 years old. Her works have been translated into various languages: Spanish, Dutch, Chinese, Lithuanian, Polish, French, Swedish, German, Estonian.
Lehtolainen received the Espoo city Award of Arts in 2000. Her novels include Ensimmäinen murhani (1993), Tuulen puolella (1998), Tappava säde (1999), Ennen lähtöä (2000) and Veren vimma (2003).