Gamagōri, city, southern Aichi ken (prefecture), central Honshu, Japan. It faces Mikawa Bay on the Pacific Ocean, about 10 miles (16 km) northwest of Toyohashi.
The city has been well known for the manufacture of cotton textiles since the Edo (Tokugawa) period (1603–1867). Mandarin orange orchards grace the mountain slopes behind Gamagōri. It also serves as a seaside resort. There are hot-spring spas nearby. The city is connected by bridge to offshore Take Island, which has a Shintō shrine dedicated to the goddess of beauty. A portion of the city lies within a unit of Mikawa Bay Quasi-national Park. Pop. (2010) 82,249; (2015) 81,100.