The Mullet Peninsula—also known as the Mullet and sometimes as the Erris Peninsula—is a peninsula in the barony of Erris in County Mayo, Ireland. It consists of a large promontory connected to the mainland at Belmullet, a town of about 2,000 inhabitants, by a narrow isthmus. There are several villages on the Mullet peninsula including Aughleam, Elly, Corclough and Binghamstown. It is about 33 km long and 12 km wide at its widest parts, and about 200 metres at the narrowest part. Its northernmost point is Erris Head. The peninsula's doglegged shape forms two bays, Blacksod Bay and Broadhaven Bay.
The Mullet Peninsula is part of the Mayo Gaeltacht, meaning that Irish is the most common language. The area has several Irish-language summer schools. The Mullet is a tourist destination, and has several beaches and a mild climate; chief attractions include golf, watersports, kiting, boating, fishing, and sea-angling.
Coordinates 54°12'59.729" N -10°1'40.803" E