Hillesøy, Hillesøya, and Hillesøyna may refer to a number of places in Norway:
Places Hillesøy Municipality, a former municipality in Troms county, Norway Hillesøy Church, a church in Tromsø Municipality in Troms county, Norway Hillesøya, an island in Tromsø Municipality in Troms county, Norway Hillesøya (Bømlo), an island in Bømlo Municipality in Vestland county, Norway Hillesøyna (Gulen), an island in Gulen Municipality in Vestland county, Norway Hillesøyna (Askøy), an island in Askøy Municipality in Vestland county, Norway