Trel may refer to:

• Fat Trel (born 1990), American rapper
• Trel., taxonomic author abbreviation of William Trelease (1857–1945), American botanist and entomologist
• Polish term for an area in the forest where felled timber is located, from which the surname Trela is derived

See also

• La-Trel, abstract strategy board game designed by Richard Morgan
• Trelly, former commune in the Manche department in Normandy in north-western France
• Trell, a given name