Pluma Hidalgo is a town and municipality in Oaxaca in south-western Mexico. The municipality covers an area of 179.9 km². It is part of the Pochutla District in the east of the Costa Region. The name of "Pluma Hidalgo" was given because there is a small mountain located on the municipality and up the mountain there is a cloud that seemed like a feather, in Spanish "pluma". Hidalgo was given because this place was founded when the independence battle was on, which began by Miguel Hidalgo y Costilla. Sierra Madre del Sur goes through this municipality which is characterized by Cerro de la Pluma, Cerro León and Cerro de las Nieves. In this region the weather is humid because of the mountains. The normal weather conditions are about 20°C, and in summer the rains are abundant. As of 2005, the municipality had a total population of 3314.