Miastko [ˈmʲastkɔ] (Kashubian/Pomeranian: Miastkò; German: Rummelsburg), is a town in the Middle Pomerania region of northwestern Poland. Administratively it has since 1999 been part of Bytów County in the Pomeranian Voivodeship; previously (1975-1998) it had been in Słupsk Voivodeship.