Byfjorden may refer to several fjords in Scandinavia:
Places Norway Byfjorden (Vestland), a fjord in the city of Bergen in Vestland county Byfjorden (Rogaland), a fjord in the city of Stavanger in Rogaland county Byfjorden (Agder), a fjord in the city of Kristiansand in Agder county Byfjorden (Tønsberg), a fjord in the city of Tønsberg in Vestfold county
Sweden Byfjorden (Sweden), a fjord in Bohuslän in Västra Götaland county