The Toyota Prius c (c stands for "city"), also known as the Toyota Aqua (Japanese: トヨタ・アクア, Hepburn: Toyota Akua); "aqua" is Latin for water) in Japan, is a full hybrid gasoline-electric subcompact/supermini hatchback manufactured and marketed by Toyota. The Prius c is the third member of the Prius family, and combines the features of a Yaris-sized car with a hybrid powertrain. The Prius c is priced lower than the conventional Prius and has a higher fuel economy in city driving under United States Environmental Protection Agency test cycles. The Prius c was ranked by the EPA as the 2012 most fuel efficient compact car when plug-in electric vehicles are excluded.

The Toyota Aqua is a full hybrid electric subcompact/supermini hatchback (B-segment) manufactured and marketed by Toyota since 2011. The nameplate is exclusive to the Japanese domestic market, as the vehicle was exported to overseas markets as the Prius c, leveraging the popularity of the Prius hybrid car nameplate and marketed as the smaller alternative to the Prius liftback.