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'Łomża Governorate' () was an administrative unit (governorate) of the Congress Poland.
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 a recreated Łomża Governorate that could trace its origins to the Łomża Department of the Duchy of Warsaw.