| Country: | POL |
| Type: | DK |
| Route: | 4 |
| Length Km: | 669 |
| Regions: | Lower Silesia Voivodeship Opole Voivodeship Silesian Voivodeship Lesser Poland Voivodeship Podkarpackie Voivodeship |
| Cities: | Legnica, Wrocław, Opole, Gliwice, Katowice, Kraków, Tarnów, Rzeszów |
| Established: | 2016 |
| Map: | PL-MapaDK4.svg |
| Maint: | GDDKiA |
| Direction A: | West |
| Terminus A: | Jędrzychowice (PL-D border) |
| Direction B: | East |
| Terminus B: | Korczowa (PL-UA border) |
| Previous Type: | DK |
| Previous Route: | 3 |
| Next Type: | DK |
| Next Route: | 5 |
| E-Road: | E40 |
National road 4 (Polish: Droga krajowa nr 4, abbreviated as DK4) is a route in the Polish national road network. The highway connects the southern regions of Poland. It runs from Jędrzychowice near Zgorzelec at the German border to Korczowa at the Ukrainian border, as the A4 motorway. National road 4 is a component of European highway E40.
The A4 motorway was completed in July 2016, therefore the entire former road 4 was renumbered as national route 94.