National road 19 (Polish: Droga krajowa nr 19) is part of the Polish national road network.

The highway connects the north-eastern and southern regions of Poland, running from Kuźnica at the Belarus border to Barwinek at the Slovak border, traversing through the Podlaskie, Masovian, Lublin and Podkarpackie voivodeships.

National road 19 is part of European highway E371.

The remaining length of the route did not have the status of national road.

Later changed course from Białystok towards Sokółka to the border in Kuźnica (former road 18).