| Country: | POL |
| Route: | 15 |
| Established: | 2000 |
| Length Km: | 372 |
| Previous Route: | 14 |
| Next Route: | 16 |
| Direction A: | North |
| Terminus A: | Ostróda |
| Direction B: | South |
| Terminus B: | Trzebnica |
| Regions: | Lower Silesian Voivodeship Greater Poland Voivodeship Kuyavian-Pomeranian Voivodeship Warmian-Masurian Voivodeship |
| Previous Type: | DK |
| Next Type: | DK |
| Maint: | GDDKiA |
| Map: | Mapa DK15.png |
| Cities: | Trzebnica, Krotoszyn, Jarocin, Września, Gniezno, Inowrocław, Toruń, Ostróda |
National road 15 (Polish: Droga krajowa nr 15) is a 374 km long G class and GP class[1] national road connecting Trzebnica with Ostróda. It runs through Lower Silesian Voivodeship, Greater Poland Voivodeship, Kuyavian-Pomeranian Voivodeship and Warmian-Masurian Voivodeship. It serves an alternative to National road 5 on Trzebnica - Gniezno segment while skipping Poznań. Later on it leads through farming lands in Kuyavia to Masuria. It crosses A2 motorway in Września.