奥尼尔（西班牙语：Onil），是西班牙巴伦西亚自治区阿利坎特省的一个市镇。总面积48km，总人口6903人（2001年），人口密度144人/km。

Onil (Valencian: [oˈniɫ], Spanish: [oˈnil]) is a town located in the comarca of L'Alcoià, in the province of Alicante, Spain. It has an area of 48.41 km² and, according to the 2006 census, a total population of 7466 inhabitants and a population density of 154.22 inhab/km². Onil is located next to the mountain called Sierra de Onil in the Sierra de Mariola, 36 km from Alicante city.