The Eyalet of Rumeli or Rumelia, also known as the Beylerbeylik of Rumeli, is a first-level province (beylerbeylik or eyalet) of the Ottoman Empire encompassing most of the Balkans ("Rumelia").

For most of its history it is also the largest and most important province of the Empire.The capital is in Adrianople (Edirne), Sofia, and finally Monastir (Bitola).

Its reported area in the nineteenth century is 48,119 square miles (124,630 km2).