Hilario Fernández Long (12 September 1918 – 23 December 2002) was an Argentine structural engineer and educator.
He participated in, among other projects, the construction of the Argentine National Library, the Buenos Aires IBM Building and the Zárate–Brazo Largo and Chaco-Corrientes bridges.
After Juan Carlos Onganía's coup d'état in 1966, he resigned as the University autonomy was violated in the Noche de los Bastones Largos (Long Stick's Night) when the police entered by force in the campuses, beating students and professors, effectively ending the so-called "Golden Age" of the Buenos Aires University.
His political commitment was reaffirmed when President Raúl Alfonsín nominated him as a member of the CONADEP commission that investigated the fate of the desaparecidos.
This article about an Argentine engineer, inventor or industrial designer is a stub.