Thomas Mountain, Thomas Mountains, or Mount Thomas, may refer to:
Thomas Mountain(s) Thomas Mountain (California), a peak in the San Jacinto Mountains, Riverside County, California Little Thomas Mountain, a secondary peak in the San Jacinto Mountains, Riverside County, California Thomas Mountain, California, an unincorporated community in Riverside County Thomas Mountain Summit, a peak in Fairfield County, Connecticut Thomas Mountains, a mountain range in Palmer Land, Antarctica
Mount Thomas Mount Thomas, a fictional town in Australian television drama Blue Heelers Mount Thomas (Alaska), a mountain in the Chugach Mountains, Alaska Mount Thomas (Antarctica), a mountain in the Prince Charles Mountains
People Thomas Mountain, winner of the 1978 Charles Ives Prize