| Country: | DEU |
| Type: | A |
| Route: | 25 |
| Map: | Bundesautobahn 25 map.png |
| Length Km: | 18 |
| Direction A: | West |
| Terminus A: | A 1 in Hamburg |
| Direction B: | East |
| Terminus B: | B 404 in Geesthacht |
| States: | Hamburg, Schleswig-Holstein |
| Previous Type: | A |
| Previous Route: | 24 |
| Next Type: | A |
| Next Route: | 26 |
is an autobahn in northwestern Germany, connecting southwestern Hamburg to Geesthacht.