Alenia Aeronautica was an Italian aerospace company. Its subsidiaries included Alenia Aermacchi and Alenia Aeronavali.

Alenia Aeronautica was also the part-owner of ATR, a joint venture with European Aeronautic Defence and Space Company (EADS).

During January 2012, the company was reorganized as Alenia Aermacchi. Three years later, it was fully merged into Finmeccanica, which has since reorganised itself as a more integrated business, adopting the Leonardo name for the group