The Mazda 121 name has been used on a variety of Mazda automobiles for various export markets from 1975 until 2002:

• 1975–1981 — Piston engined variants of the second generation Mazda Cosmo sports car
• 1986–1991 — First generation Ford Festiva; subcompact car
• 1991–1998 — Autozam Revue; subcompact four-door sedan
• 1996–2002 — First generation Mazda Demio; subcompact car (in countries where the Fiesta-based "121" was not sold)
• 1996–2002 — Badge engineered version of the fourth-generation Ford Fiesta subcompact car, sold in some European markets