Alessi is an Italian surname, derived from the given name Alessio (Alexis). Notable people with the surname include:
Alberto Alessi (1939–2022), Italian lawyer and politician Andrea Alessi (1425–1505), Venetian Dalmatian architect and sculptor Daniel Alessi (born 1997), Australian football (soccer) player Dario Alessi (born 1967) British biochemist 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 to 1949 and again from 1955 to 1956 Giuseppe Alessi (soccer player) (born 1977), Italian footballer James G. Alessi, American physicist Joseph Alessi (born 1959), American trombonist Marc Alessi (born 1976), American politician Mark Alessi (1953–2019), American businessman and comic publisher Mary Alessi (born 1968), American Christian songwriter Mike Alessi (born 1988), American motorcycle racer Ottavio Alessi (1919–1978), Italian screenwriter, producer and film director Ralph Alessi (born 1963), American jazz trumpeter and composer Raquel Alessi (born 1983), American actress
Fictional characters Benito Alessi and his family, a fictional family on the Australian television series Neighbours
See also Andrija Aleši, Albanian sculptor