Andreini is an Italian surname. Notable people with the surname include:
Alfredo Andreini, Italian physician and entomologist and discoverer of 25 of the convex uniform honeycombs (also called Andreini tessellations) in 1900
Eddie Andreini (1937–2014), American aerobatic pilot
Francesco Andreini, Italian actor
Isabella Andreini, Italian actress
Giambattista Andreini, Italian playwright and actor