Harnoncourt may refer to:
Harnoncourt (Arnonco) is a commune until 1977 in southern Belgium, now in the Rouvroy. And name of an Austrian noble family originated from that place name.
- Count Rene d'Harnoncourt (1901 - 1968), an Austrian-US museum director
- Anne d'Harnoncourt (1943 – 2008), an American museum director, historian of modern art
- Count Nikolaus Harnoncourt (born 1929), an Austrian conductor
- Alice Harnoncourt, born Hoffelner (1930), an Austrian violinist, wife of Nikolaus
- Philipp Harnoncourt (born 1931), Austrian Catholic theologian; (de)
- Franz Harnoncourt (born 1937); (de)
- Elisabeth von Magnus (née Harnoncourt) (born 1954) mezzo-soprano, daughter of Nikolaus and Alice
- Philipp Harnoncourt (director) (born 1955), Austrian director; (de), son of Nikolaus and Alice
Coordinates: 49°32′02″N 5°30′00″E / 49.534°N 5.500°E / 49.534; 5.500
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