Kazimierz Lutosławski (March 4, 1880, Drozdowo, Podlaskie Voivodeship - January 5, 1924, Drozdowo, Poland) was a Polish physician, priest and Polish Scouting founder and activist. He designed the Krzyż Harcerski (Polish Scouting Cross).
Kazimierz was born in 1880 at an estate in Drozdowo northeast of Warsaw to a Polish family of agronomist Franciszek Dionizy Lutosławski and his second wife Paulina née Szczygielska, highly educated members of the landed gentry. Kazimierz became one of Franciszek's six notable sons. He received doctorate in medicine in Zürich, Switzerland. Kazimierz was the fifth son of Franciszek. His older brother Marian Lutosławski, famous inventor and humanitarian, was murdered by the Bolsheviks near Moscow together with his other brother Józef Lutosławski, the father of composer Witold Lutosławski. Witold was Kazimierz Lutosławski's nephew.
- Steven Stucky (1981). Lutosławski and His Music. Cambridge University Press. p. 1. ISBN 978-0-521-22799-5.
- Muzeum (13 December 2009). "Marian Lutosławski". Lutosławscy w Drozdowie (in Polish). Muzeum Przyrody w Drozdowie (w dawnej siedzibie rodziny Lutosławskich). Retrieved 14 August 2014.
- Marcin Rydzewski (Muzeum Przyrody w Drozdowie) (2007-05-23). "Ks. Kazimierz Lutosławski pseudonim Jan Zawada". Galeria Zasłużonych Ziemi Łomżyńskiej. Starostwo Powiatowe Łomża. Retrieved 5 September 2014.