Loys, Loÿs, Loyse or Loysé is a given name which may refer to:
People Loys of Gruuthuse (c. 1422–1492), better known as Lewis de Bruges, lord of Gruuthuse Loys Louis Bourgeois (composer) (c. 1510–1559), French composer and music theorist Loys Choquart (1920–1989), Swiss jazz reedist, bandleader, and broadcaster Loysé Youth Deal, birth name of Borden Deal (1922–1985), American novelist and short story writer Loÿs Delteil (1869–1927), French engraver, lithographer, illustrator, and art historian Loÿs Papon (1533–1599), French playwright
Fictional characters Loys, in the ballet Giselle Loyse, in the opera La Belle au bois dormant Loyse, in the novel Witch World Loyse, sister of the title character of the novel Catherine
See also François de Loys (1892–1935), Swiss oil geologist and discoverer of "De Loys's ape", a misidentified alleged species or hoax Charles Guillaume Loys de Bochat (1695–1754), Swiss jurist, historian and antiquarian Jean-Philippe Loys de Cheseaux (1718–1751), Swiss astronomer Loys Station Covered Bridge, Maryland, United States, on the National Register of Historic Places