Mecklenburg (German pronunciation: [ˈmeːklənbʊʁk], locally [ˈmeiklɪnbʊɪ̯ç], Low German: Mękel(n)borg [ˈmɛːkəl(n)bɔrx]) is a historical region in northern Germany comprising the western and larger part of the federal-state Mecklenburg-Vorpommern. The largest cities of the region are , Schwerin, Neubrandenburg, Wismar and Güstrow.
The name Mecklenburg derives from a castle named "Mikilenburg" (Old Saxon: "big castle", hence the scientific translation used in New Latin Megalopolis), located between the cities of Schwerin and Wismar. In Slavic language it was known as Veligrad which also means "big castle". It was the ancestral seat of the House of Mecklenburg and for a time divided into Mecklenburg-Schwerin and Mecklenburg-Strelitz among the same dynasty.
Linguistically Mecklenburgers retain and use many features of Low German vocabulary or phonology.
The adjective for the region is Mecklenburgian (German: mecklenburgisch), inhabitants are called Mecklenburgians (German: Mecklenburger).
Mecklenburg is known for its mostly flat countryside. Much of the terrain forms a morass, with ponds, marshes and fields as common features, with small forests interspersed. The terrain changes as one moves north towards the Baltic Sea.