Porsgrunn Bridge (in Norwegian Porsgrunnsbrua) is a drawbridge constructed of concrete. It is locations in Porsgrunn town and municipality in Telemark county, Norway. The bridge, which was completed in 1958, connects the eastern and western sides of Porsgrunn town center. It crosses the Porsgrunn River (in Norwegian Porsgrunnselva) a little above the point where the Skien watershed discharges into the Frierfjord.