Long Mountain may refer to:
Geography China Mount Long (陇山), the southern section of Mount Liupan within Shaanxi province, which defines the western end of the Guanzhong region
Jamaica Long Mountain (Jamaica), a mountain in the Kingston area
United Kingdom Long Mountain (Powys), on the borders of Powys, Wales and Shropshire, England
United States Long Mountain (Hampshire County, Massachusetts) Long Mountain, just west of Tuxedo, North Carolina Long Mountain in Hardy County, West Virginia
Other Long Mountain (radar), Taiwanese air defense and BMD radar
See also De Long Mountains, Alaska, United States Langeberg, a mountain range in South Africa Long Mynd, Shropshire, England Long Range Mountains, Newfoundland, Canada