Aloisio or Aloísio is a Romance masculine given name, arising via an Old Occitan form Aloys from Louis.

• Aloisio da Milano, also known as Aloisio da Carezano, Aleviz Milanets and Aleviz Fryazin, 15th/16th century Italian architect
• Aloisio the New, 16th century Italian Renaissance architect
• Aloísio Pires Alves (born 1963), Brazilian footballer (defender)
• Aloísio da Silva Filho (born 1974), Brazilian footballer (goalkeeper)
• Aloísio José da Silva (born 1975), Brazilian footballer (striker)
• Aloísio dos Santos Gonçalves (born 1988), Brazilian footballer (striker)

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