Rubuta ci gaba don wannan sakin layi - A ƙarshen Yaƙin Duniya na II, Red Army ya mamaye garin a lokacin Farashin Prussian na Gabas kuma ya rasa kusan kashi 20% na gine-ginensa. Jama'ar Jamus da suka rage bayan kwashewa
An fitar da su da yawa bayan yakin kuma an maye gurbinsu da 'yan Poland. Daga 1945 zuwa 1947 an san garin da sunan Poland na tarihi "Ządzbork". An canza sunan garin zuwa "Mrągowo" na yanzu a cikin 1947, don girmama fasto dan Poland, marubuci kuma mai fassara Krzysztof Celestyn Mrongovius (1764<unk>1855), sanannen mai kare yaren Poland a Masuria.