Сувалкская губерния
According to contemporary Russian Empire statistics, from 1889 the Suwałki Governorate was predominantly Lithuanian since they comprised 57.8% of the population. Lithuanians formed a majority only in the northern part of the governorate in the counties of Kalvarija, Marijampolė, Naujamiestis, Vilkaviškis as well as the eastern part of the Sejny county. Poles were in a majority in the southern part of the governorate in the counties of Suwałki, Augustów and in the western part of the Sejny county.