Rubuta ci gaba don wannan sakin layi - Bayan faduwar tsarist Rasha, fada ya barke don iko da birnin da yankin da ke kewaye da shi. A lokacin mamayewar Soviet (Polish <unk> Soviet War), tashin hankalin Nieśwież da ba a yi nasara ba daga mazaunan Poland ya faru a cikin Maris 14 <unk> 19, 1919. Duk da haka, 'yan Poland sun sake kama Nieśwież a ranar 19 ga Afrilu, 1919 kuma sun sake shiga cikin jihar Poland da aka sake kafa. Ya zama powiat a cikin Novogródek Voivodeship har zuwa mamayewar Soviet na Poland a watan Satumbar 1939. A lokacin Yaƙin Duniya na II, daga 1939 zuwa 1941 ya kasance ƙarƙashin mamayar Soviet
, daga 1941 zuwa 1944 a ƙarƙashin mamayar Jamus, kuma daga 1944 zuwa 1945 a ƙarƙashin mamayar Soviet, kafin a sake ɗauke shi daga yankin Poland kuma Soviet Union ta haɗa shi, daidai da Yarjejeniyar Potsdam.