Breg

Breg may refer to:

Slovenia

 * Breg, Majšperk, settlement in the Municipality of Majšperk
 * Breg, Mežica, settlement in the Municipality of Mežica
 * Breg, Sevnica, settlement in the Municipality of Sevnica
 * Breg, Žirovnica, village in the Municipality of Žirovnica
 * Breg ob Bistrici, settlement in the Municipality of Tržič

Serbia

 * Bački Breg, village

Croatia

 * Breg, Croatia, village in Istria County

River

 * Breg (river), river in Germany

Names

 * Breg (Irish mythology), considered a classic Celtic Triple Goddess
 * Cobthach Cóel Breg, high king of Ireland in the 6th century BC

Science

 * Regulatory B cells (Bregs)