Andreani is an Italian surname, derived from Andrea (Andrew). Notable people with the surname include:
Aldo Andreani (1887–1971), Italian architect and sculptor Andrea Andreani (1540–1623), Italian engraver André-ani (1901–1953), American costume designer Clément Henri Andreani (1901–1953), American costume designer Éveline Plicque-Andréani, née Boudon (1929–2018), French composer, musicologist and pedagogue George Andreani (1901–1979), Polish film score composer of Argentine films Giulia Andreani (born 1985), Italian artist Henri Andréani (1877–1936), French film director of the silent era Isabelle Andréani (1923–2018), French mezzo-soprano Jacques Andreani (1929–2015), French diplomat Luca Andreani (born 2001), Italian rugby union player Marcelo Andreani (1910–1982), Italian-born Mexican professional wrestler Paolo Andreani (1763–1823), Italian who made the first balloon flight over Italian soil
Other uses Palazzo Sormani-Andreani, seat of the central public library of Milan