• (slang/colloquial) The abdomen, the part of the body between the pelvis and the thorax or, similarly, to the stomach
• A beer belly, an overhang of fat above the waist, presumably caused by regular beer ingestion.
• Belly dance
• The upper or outer surface of a stringed musical instrument, nearer the strings; the other surface is the back
• The draft in a sail
• Tuna belly (fatty tuna), also known as Toro, used in Japanese food
• Belly, a kind of steelpan

Belly may also refer to:

• Belly (band), a rock band
• Belly (rapper), a rap/hip-hop artist
• Belly (film), a 1998 movie
• Leon-August-Adolphe Belly (artist), a 19thC French painter