Toyoyama is a town in Nishikasugai District, Aichi Prefecture, Japan. It is located in the Aichi region of central Honshu. The town covers a total area of 6.18 square kilometres (2.39 square miles).
As of 1 October 2019, Toyoyama had an estimated population of 15,630 people living in 6,757 households, giving it a population density of 2,529 persons per square kilometre. Its small area combined with this population makes it a densely settled municipality.