Atimonan, officially the Municipality of Atimonan, is a 1st class municipality in the province of Quezon, Philippines. According to the 2020 census, it has a population of 64,260 people. It lies on the eastern shore of the province, 42 kilometers from Lucena and 172 kilometers southeast of Manila. Atimonan is bounded by the municipalities of Gumaca, Plaridel, Pagbilao and Padre Burgos.