亚平宁山脉（意大利语：Appennini），位于亚平宁半岛东侧，是亚平宁半岛的主干山脉，北起阿尔卑斯山南麓，南至亚平宁半岛南端，全长超过1000公里。全境属意大利管辖。

多悬崖峭壁的断层式海岸。

The Apennines or Apennine Mountains (/ˈæpənaɪn/; Greek: Ἀπέννινα ὄρη; Latin:Appenninus or Apenninus Mons—a singular used in the plural; Italian:Appennini [appenˈniːni]) are a mountain range consisting of parallel smaller chains extending c.1,200 km (750 mi) along the length of peninsular Italy. In the northwest they join with the Ligurian Alps at Altare. In the southwest they end at Reggio di Calabria, the coastal city at the tip of the peninsula. Since about 2000 the Ministry of the Environment of Italy, following the recommendations of the Apennines Park of Europe Project, has been defining the Apennines System to include the mountains of north Sicily, for a total distance of 1,500 kilometres (930 mi). The system forms an arc enclosing the east side of the Ligurian and Tyrrhenian Seas.