Altissimo (Italian, 'very high', feminine form: altissima) is the uppermost register on woodwind instruments.

Altissimo may also refer to:

Altissimo (album), by Gary Bartz, Lee Konitz, Jackie McLean and Charlie Mariano, 1973 Altissimo, Veneto, a place in Italy Monte Altissimo, a mountain in the Bergamasque Prealps, Italy Cristofano dell'Altissimo (c. 1525–1605), an Italian painter Renato Altissimo (1940–2015), an Italian politician in altissimo, singing above the note F

See also

in alt, singing in the octave above the treble staff, G to F