Aloysia is a genus of flowering plants. It is also a feminine given name that may refer to the following people
First name Aloysia Weber (1760 – 1839), German soprano Aloysia Sygaea Toletana (1522 – 1560), Spanish poet
Middle name Anna Aloysia Maximiliane von Lamberg (? - 1738), Austrian countess Maria Aloysia of Dietrichstein (1700 – 1783), German noblewoman
Mary Aloysia Hardey (1809 – 1886), American religious sister
See also Aloisia