Gilla may be:

• an Irish masculine given name or name-element, meaning "boyservant"
  • Gilla Cómáin mac Gilla Samthainde (fl. 1072)
  • Gilla Pátraic (d. 1084)
  • Gilla Aenghus Ua Chlúmháin (d. 1143)
  • Gilla Cheallaigh Ua hEidhin (d. 1153)
  • Gilla Asalta (d. 1172)
  • Gilla Cellaig Ó Ruaidín (d. 1204)
  • Gilla na Naemh Crom Ó Seachnasaigh (d. 1224)
  • Giolla Íosa Mac Fir Bisigh (d. 1301)
  • Gilla Duibin Mac Cruitín (d. 1405)
  • Gilla Dubh Ó Flaithbheartaigh (d. 1442)
  • Roger Gilla Dubh Ó Seachnasaigh (d. 1650)
• a Hebrew feminine given name (גילה) meaning "joy" (also spelled Gillah)
  • Gilla Gerzon
• the stage name of an Austrian disco-era singer, see Gilla (singer)