Red Branch may refer to :

• Red Branch (from the Old Irish Cróeb Ruad , or , Cróeb Derg ) - the name of two royal houses of Ulster
  • Red Branch Cycle (or Ulster Cycle) legends and sagas of heroes of Ulster

• Red Branch, Texas, an unincorporated community in Trinity County, Texas
• Red Branch (novel), (1989), novelisation of the life of the Irish hero Cú Chulainn by the Irish-American author Morgan Llywelyn

See also

• Red Hand of Ulster
• Red-giant branch