Alessi may refer to:
People:
- Andrija Aleši, Albanian sculptor
- Diego Alessi (born 1973), Italian race car driver
- Galeazzo Alessi (1512-1572), Italian architect
- Giuseppe Alessi (1905-2009), President of the Regional Government of Sicily from 1947-1949 and again from 1955-1956
- Giuseppe Alessi (soccer player) (born 1977), Italian footballer
- Joseph Alessi (born 1957), American trombonist
- Marc Alessi, American politician
- Mark Alessi, comic publisher
- Mary Alessi, American Christian songwriter
- Raquel Alessi, American actress
Fictional characters:
- Alessi (JoJo's Bizarre Adventure), minor character appearing in the Japanese manga JoJo's Bizarre Adventure
- Benito Alessi and his family, a fictional family on the Australian television series Neighbours
Other:
- Alessi (company), Italian kitchenware company
- Alessi Brothers, an American pop music vocal duo