MT2 may refer to:
Melatonin receptor 1B Metallothionein 2A Melanotan II, a synthetic hormone that induces melanin production Metals Treatment Technologies (Methyl-Co(III) methylamine-specific corrinoid protein):coenzyme M methyltransferase Monster Train 2 Montana Highway 2 Montana's 2nd congressional district No. 2 Morse taper, a size of machine taper Boss MT-2 Metal Zone, a distortion pedal