National road 8 (Polish: Droga krajowa nr 8, abbreviated as DK8) is a route in the Polish national road network, running diagonally through Poland from the Czech border in Kudowa Zdrój in the south-west to Raczki near the border with Lithuania in the north-east, through the Lower Silesia, Greater Poland, Łódź, Masovian and Podlaskie voivodeships. For most of its length it forms the Polish section of the European route E67 known as the Via Baltica between Warsaw and Tallinn.

National Road 8
Droga krajowa nr 8
Trunk road standard   Expressway (S8) standard   Wrocław Motorway Bypass (A8)
Route information
Part of E67
Maintained by GDDKiA
Length	753 km (468 mi)
Existed	1986–present
Major junctions
South end	Kudowa-Zdrój (PL-CZ border)
North end	S 61 in Raczki
Location
Country	Poland
Regions	Lower Silesian Voivodeship Greater Poland Voivodeship Łódź Voivodeship Masovian Voivodeship Podlaskie Voivodeship
Major cities	Wrocław, Warsaw, Białystok
Highway system
National roads in Poland Voivodeship roads
← DK 7 → DK 9

Until 2022 it was the longest road in Poland with a total length of 804 km. In December 2022 the last segment of the DK 8 to Budzisko on the border with Lithuania was transferred to become a part of the DK 61.