Duchy of Bydgoszcz and Wyszogród was a district principality and a fiefdom within the Kingdom of Poland during the era of fragmentation. It was formed between 1314 and 1315 from part of the Duchy of Inowrocław, and existed until 1323 when it was incorporated back into it. The country was located in the Kuyavia centered around its co-capitals: Bydgoszcz and . Its only ruler was the duke Przemysł of Inowrocław of the Piast dynasty.