Sölvesborg Municipality (Sölvesborgs kommun) is a municipality in Blekinge County in southern Sweden. It borders to Bromölla Municipality, Olofström Municipality and Karlshamn Municipality. The town Sölvesborg is the seat of the municipality.The present municipality was formed in 1971 when the City of Sölvesborg was amalgamated with the rural municipalities Gammalstorp and Mjällby.