Choisy may refer to:

• Choisy-le-Roi, a commune of the Val-de-Marne département, France
  • Choisy Cathedral in Choisy-le-Roi
  • Château de Choisy a demolished royal palace at Choisy-le-Roi
• Choisy, Haute-Savoie, a commune of the Haute-Savoie département, France
• Choisy-en-Brie, a commune of the Seine-et-Marne département, France
• Porte de Choisy (Paris Metro), a station of the Paris Métro
• Choisy-au-Bac, a commune of the Oise département, France
• Choisy-la-Victoire, a commune of the Oise département, France

• François-Timoléon de Choisy (1644–1724), French author
• Jacques Denys Choisy (1799–1859), Swiss botanist whose standard author abbreviation is Choisy
• Auguste Choisy (1841–1909), French architectural historian and educator
• Maryse Choisy (1903–1979), French philosophical writer
• Maurice Gustave Benoit Choisy (1897–1966, M. Choisy), mycologist and lichenologist