The Balearic Sea (endotoponym: Mar Balear in Catalan and Spanish) also known as Iberian Sea, is a body of water in the Mediterranean Sea between the Balearic Islands and mainland Spain. The Ebro River flows into this small sea.

The Balearic islands are divided into two groups: Gimnesias in the northeast, and Pitiusas in the southwest.

• Menorca
• Mallorca
• Cabrera

• Ibiza
• Formentera

The International Hydrographic Organization defines the limits of the Balearic Sea as follows:

Between the Islas Baleares and the coast of Spain, bounded:

On the Southwest. A line from Cape Sant Antoni, Valencian Community (38°50′N 0°12′E / 38.833°N 0.200°E / 38.833; 0.200) to Cape Berberia, the Southwest extreme of Formentera (Balearic Islands).

On the Southeast. The South Coast of Formentera, thence a line from Punta Rotja, its Eastern extreme, to the Southern extreme of Cabrera, Balearic Islands (39°07′N 2°54′E / 39.117°N 2.900°E / 39.117; 2.900) and to Illa de l'Aire, off the Southern extreme of Menorca.

On the Northeast. The East coast of Menorca up to Cap Favaritx (40°00′N 4°14′E / 40.000°N 4.233°E / 40.000; 4.233) thence a line to Cape Sant Sebastià Catalonia (41°54′N 3°10′E / 41.900°N 3.167°E / 41.900; 3.167).

• Gulf of Cádiz
• Gulf of Lion

40°0′N 1°30′E / 40.000°N 1.500°E / 40.000; 1.500