ɐkˈoːɹdɪŋ tə ðə jˈuː.ˈɛs. sˈɛnsəs bjˈʊɹɹoʊ, ðə bˈɛlmɔnt sˌiːdˌiːpˈiː hɐz ɐ tˈoʊɾəl ˈɛɹiə ʌv , ʌvwˈɪtʃ , ɔːɹ wˈʌn.twˈɛnti pɚsˈɛnt, ɑːɹ wˈɔːɾɚ.
According to the U.S. Census Bureau, the Belmont CDP has a total area of , of which , or 1.20%, are water.