Plaridel, officially the Municipality of Plaridel (Tagalog: Bayan ng Plaridel), is a municipality in the province of Quezon, Philippines. According to the 2024 census, it has a population of 10,866 people.

The municipality was created in 1962 by virtue of Republic Act No. 3493 where its territories carved out from Atimonan.

Under the Republic Act No. 3493, barrios were taken from Atimonan, Quezon to constitute the Municipality of Plaridel. These barrios include Siain, Ilosong, Concepcion, Duhat, and Tanauan. As the Act decreed, Siain became the seat of government.

The Act was based on House Bill No. 822 introduced by Congressman Eladio A. Caliwara who was then representing the Second District of Quezon. It was signed in June 1962 by Philippine president Diosdado Macapagal enacting it as a law.

The Municipality of Plaridel was inaugurated on October 27, 1962.

The smallest municipality in the province of Quezon, Plaridel has an area of 33 square kilometers comprising nine barangays - four of which are poblaciones - and its population is around 11,000. It lies between the towns of Atimonan and Gumaca, hugging the coastline of the Province alongside Maharlika Highway. Its inhabitants are occupied primarily with fishing. Those engaged in Agriculture plant mostly coconut and rice. A visitor this town must taste and savor its local version of Suman.

Plaridel is 55 kilometres (34 mi) from Lucena and 185 kilometres (115 mi) from Manila.

Plaridel is politically subdivided into 9 barangays, as indicated below. Each barangay consists of puroks and some have sitios.