Arida, Wakayama

 is a city in Wakayama Prefecture, Japan. As of October 1, 2016, the city had an estimated population of 27,963 and a population density of 760 persons per km². The total area is 36.91 km². It faces the Kii Channel.
Arida was founded on May 1, 1956, when the neighbouring four towns of Minoshima, Miyazaki, Yasuda and Miahara merged to form a single city. The main industries in Arida and the surrounding areas are oil refining and fishing. It is famous as one of the largest producers of "mikan" or Japanese mandarins in Wakayama Prefecture.
Arida's sister city in the US is Delano, California.