Dacia Mediterranea (Mediterranean Dacia; Greek: Επαρχία Δακίας Μεσογείου, Eparchia Dakias Mesogeiou) was a late antique Roman province, split off from the former Dacia Aureliana by Roman emperor Diocletian (284-305). Serdica (or Sardica; later Sradetz or Sredets, now Sofia) was the province capital.
Scholars have different opinions regarding the date and circumstances of the foundation of Dacia Mediterranea as a separate province.
In 535, emperor Justinian I (527-565) created the Archbishopric of Justiniana Prima as a regional primacy with ecclesiastical jurisdiction over all provinces of the Diocese of Dacia, including the province of Dacia Mediterranea'. 
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