Casimiro Montenegro Filho (29 October 1904—26 February 2000) was a Brazilian army and air force officer.
He reached the rank of Marechal-do-ar, the highest rank of the Brazilian Air Force rank system.
Born in Fortaleza, Montenegro joined Realengo Military School in 1923, and in 1928 became an Aspirant in the Brazilian army's first class of aviators for its new Military Aviation Arm.
He later served under Eduardo Gomes, another future Marshal of the Air.
Two years later, that proposal was translated into a plan, with the collaboration of MIT Professor Richard Harbert Smith, who became, in the sequence, the first rector of ITA.