• Defunct motorcycle manufacturers of Italy (5 C, 29 P)

A

• Aprilia (2 C, 3 P)

B

• Benelli (motorcycles) (1 C, 2 P)
• Bimota (1 C, 3 P)

C

• Cagiva (1 C, 1 P)

D

• Ducati (company) (3 C, 12 P)

G

• Gilera (1 C, 2 P)

M

• Malaguti (1 C, 1 P)
• Mondial (motorcycle) (1 C, 1 P)
• Moto Guzzi (2 C, 3 P)
• Moto Morini (2 P)
• MV Agusta (2 C, 12 P)

P

• Piaggio Group (11 C, 9 P)

A

• Aprilia
• Askoll
• Atala (company)

B

• Benelli (motorcycles)
• Gruppo Bertone
• Beta (motorcycle manufacturer)
• Bimota
• Borile

C

• Cagiva

D

• Di Blasi Industriale
• Ducati

E

• Energica Motor Company

F

• Fantic Motor

G

• Garelli Motorcycles
• Ghezzi & Brian
• Gilera

I

• Italjet

K

• KRC Motors

L

• Lambretta

M

• Magni (motorcycle)
• Malaguti
• Mondial (motorcycle manufacturer)
• Moto Guzzi
• Moto Morini
• Motori Minarelli
• MV Agusta

P

• Paton (motorcycles)
• Piaggio
• Polini

S

• Speed Up
• SWM (motorcycles)

T

• Tacita (motorcycles)
• Tamburini Corse
• Terra Modena

V

• Vespa
• Vyrus