Сувалкская губерния
It was created in 1837 from the Płock Voivodship, and had the same borders and capital (Płock) as the voivodship. In 1867 territories of the Augustów Governorate and the Płock Governorate were divided into a smaller Płock Governorate, Suwałki Governorate (consisting mostly of the Augustów Governorate territories) and recreated Łomża Governorate.