Wallis (derived from Wallace) may refer to:

• Wallis (given name)
  • Wallis, Duchess of Windsor
• Wallis (surname)

• Wallis (Ambleston), a hamlet within the parish of Ambleston in Pembrokeshire, West Wales, United Kingdom
• Wallis, Mississippi, an unincorporated community, United States
• Wallis, Texas, a city, United States
• Wallis and Futuna, a French overseas department
  • Wallis Island, one of the islands of Wallis and Futuna
• Valais, a Swiss canton with the German name "Wallis"
• Walliswil bei Niederbipp, a municipality in the Oberaargau administrative district, canton of Bern, Switzerland
• Walliswil bei Wangen, a municipality in the Oberaargau administrative district, canton of Bern, Switzerland

• Wallis (retailer), a British clothing retailer
• Wallis Theatres, an Australian cinema franchise

• Wallace (disambiguation) (original form)