尼普顿山脉是南极洲的山脉，位于伊利沙伯女皇地，处于福里斯特尔山脉西南部，属于彭萨科拉山脉的一部分，全长112公里，在1956年1月13日由美国海军发现。

The Neptune Range is a mountain range, 112 km (70 mi) long, lying WSW of Forrestal Range in the central part of the Pensacola Mountains in Antarctica. The range is composed of Washington Escarpment with its associated ridges, valleys and peaks, the Iroquois Plateau, and the Schmidt and Williams Hills. It was discovered and photographed on January 13, 1956 on a US Navy transcontinental plane flight from McMurdo Sound to Weddell Sea and return.