穆奥尼奥（芬兰语：Muonio）是芬兰拉普兰省的一个市，位于穆奥尼奥河畔，邻近瑞典边境。

Muonio (previously called Muonionniska, Northern Sami:Muoná) is a municipality of Finland.

The town is located in far northern Finland above the Arctic Circle on the country's western border, within the area of the former Lappi (Lapland) province. The municipality has a population of 2,365 (30 June 2015) and covers an area of 2,038.15 square kilometres (786.93 sq mi) of which 133.91 km (51.70 sq mi) is water. The population density is 1.24 inhabitants per square kilometre (3.2/sq mi). The next closest Finnish municipalities are Enontekiö, Kittilä, and Kolari; and to the west is Sweden's Pajala. On the south side of town, a road bridge crosses the Muonio River, linking Muonio to northern Norrbotten County, Sweden. Muonio is good base for exploring the many things to do in the area and is on the E8 highway which goes north to Kilpisjärvi.