Mareo (German: Enneberg; Italian: Marebbe) is a comune (municipality) in South Tyrol in the Italian region Trentino-Alto Adige/Südtirol, located about 90 km northeast of Trento and about 50 km northeast of Bolzano (Bozen).

As of 30 November 2010, it had a population of 2,911 and an area of 161.6 km².

The municipality of Mareo contains the frazioni (subdivisions, mainly villages and hamlets) Curt (Hof/Corte), Mantena, La Pli de Mareo , Pliscia (Plaiken/Plisa), Al Plan (St.Vigil/San Vigilio), Rina (Welschellen), and Longega (Zwischenwasser).

Mareo borders the following municipalities: Badia, Prags, Bruneck, Cortina d'Ampezzo, La Val, Lüsen, St. Lorenzen, San Martin de Tor and Olang.

The shield is parted quarterly: the first part represents the Tyrolean Eagle on argent; the second the insignia of Austria. The third shows the head's dog of argent, with an or collar on gules, which represents the arms of the Lords of Ros that in thirteenth century had a castle in the village. The fourth arms is a sable hound with a gules bone in the jaws on argent; it’s the coat of Pracken family, one of the oldest families in Tyrol, which had properties in the area. The emblem was adopted in 1969.