The Duchy of Merania (also Meran, Merano, or Meranie, ) was a short-lived Estate of the Holy Roman Empire existing from 1153 until 1248. It was also called the Duchy of Dalmatia as it covered the northern Dalmatian seacoast. The name "Merania" (not to be confused with Tyrolean Meran) derives from (sea), probably referring to the coastal strip on the Kvarner Gulf of the Adriatic Sea west of Rijeka, which belonged to the Imperial March of Istria.