Sölvesborg Municipality is a municipality in Blekinge County in South Sweden in southern Sweden. It borders to Bromölla Municipality, Olofström Municipality and Karlshamn Municipality. The town Sölvesborg is the seat of the municipality.

Blekinge County is a county or län in the south of Sweden. It borders the Counties of Skåne, Kronoberg, Kalmar and the Baltic Sea. The capital is Karlskrona. It is the smallest of the present administrative counties of Sweden, covering only 0,7% of the total area of the country. Princess Adrienne, the daughter of Princess Madeleine, is Duchess of Blekinge.