The territory became part of the emerging Polish state under
Mieszko I around 967. Following the fragmentation of Poland into smaller duchies it formed part of the
Duchy of Pomerania. There are archaeological traces of Slavic settlement dating back to the 12th century. In 1281 the town was exempted from customs duties and declared a free port. In 1306 Duke
Otto I allowed the town to build a bridge and a dam over the Oder and collect customs duties on it like
Stettin (Szczecin). In 1709 Polish King
Stanisław Leszczyński stopped in the town. In 1723,
French Huguenots settled in Greifenhagen. In the final months of
World War II, in March 1945, it was captured by
Soviet and Polish forces. During the conquest the town center was heavily destroyed. Afterwards, the region became again part of Poland, although with a Soviet-installed communist regime, which stayed in power until the
Fall of Communism in the 1980s. The remaining German population was
expelled in accordance with the
Potsdam Agreement and gradually replaced by Polish settlers. Despite the existence of the old Polish name
Gryfów, the town was first renamed to
Gryfin, and in 1946 to
Gryfino by replacing the German suffix -hagen by the Polish suffix -ino. A local unit of the
Freedom and Independence Association Polish anti-communist resistance organization operated in Gryfino, before it was crushed by the communists in May 1946. After the war, the town's life was reestablished, in 1945 the first schools began teaching, in 1946 the Gryf cinema was opened, and in 1947 the municipal library was opened. In 1974 the first unit of
Dolna Odra Power Station, a large coal-fired power station, went in service. ==Demographics==