Toyohashi is a city in Aichi Prefecture, Japan. As of 1 December 2019, the city had an estimated population of 377,453 in 160,516 households and a population density of 1,400 persons per km2. The total area of the city was 261.86 square kilometres (101.10 sq mi). By area, Toyohashi was Aichi Prefecture's second-largest city until March 31, 2005 when it was surpassed by the city of Toyota, which had merged with six peripheral municipalities.

The Aichi Prefectural Assembly is the legislative assembly of Aichi Prefecture.