Aleksanteri is a masculine Finnish given name. Notable people with the name include:
Aleksanteri Aava (1883–1956), Finnish poet Aleksanteri Ahola-Valo (1900–1997), Finnish artist and architect Aleksanteri Saarvala (1913–1989), Finnish gymnast Aleksanteri Toivola (1893–1987), Finnish sport wrestler Veikko Aleksanteri Heiskanen (1895–1971), Finnish geodesist
See also Aleksanteri Institute, an institute of the University of Helsinki