Mahiljouskaja Woblasz
The census of 1959 had 538,881 ethnic Poles in Belarus (332,300 in Grodno Region, 83,800 in Vitebsk Region, 70,000 in Minsk Region including Minsk, 42,100 in Brest Region, 7,200 in Gomel Region and 3,500 in Mogilev Region).