The first name Alois, Aloïs or Aloys can refer to
- Alois I, Prince of Liechtenstein
- Alois II, Prince of Liechtenstein
- Alois, Hereditary Prince of Liechtenstein
- Alois Alzheimer, a German psychiatrist and neuropathologist
- Alois Arnegger, an Austrian painter
- Brother Alois, the Prior of the Taizé community
- Alois Brunner, an Austrian Nazi war criminal
- Alois Buttinger, an Austrian socialist
- Alois Carigiet, a Swiss illustrator
- Aloïs Catteau, a Belgian cyclist
- Alois Dryák, a Czech architect
- Alois Eliáš, a Czech general and politician
- Alois Hába, a Czech composer
- Alois Hitler, born Aloys Schicklgruber; Adolf Hitler's father
- Alois Hitler, Jr., Adolf Hitler's half-brother
- Alois Hudal, a Rome-based, pro-Nazi bishop of Austrian descent
- Alois Jirásek, a Czech writer
- Aloys P. Kaufmann, a mayor of Saint Louis
- Alois Kayser, a German Roman Catholic missionary who spent almost 40 years on Nauru and wrote a Nauruan grammar
- Aloïs Michielsen, a Belgian businessman
- Alois Mock, an Austrian politician
- Alois Musil, a Czech explorer, orientalist and writer
- Alois Negrelli, an engineer and railroad pioneer in Austria, Italy and Switzerland
- Aloys Pennarini, a tenor opera singer, opera director and film actor
- Alois Rašín, a Czech economist and politician
- Alois von Reding, a Swiss patriot
- Pope Benedict XVI, born Joseph Alois Ratzinger
- Alois Riehl, an Austrian philosopher
- Alois Senefelder, an Austrian actor and playwright who invented the printing technique of lithography
- Arnold Alois Schwarzenegger, an Austrian actor and American politician
- Aloys Sprenger, an Austrian historian
- Alois Švehlík, a Czech actor
- Alois P. Swoboda, a pioneer of American physical culture
- Alois Vašátko, a Czech fighter pilot
- Aloys Wach, an Austrian expressionist painter and graphic artist