| Country: | DEU |
| Type: | B |
| Route: | 77 |
| Map: | B077 Verlauf.svg |
| Length Km: | 71 |
| Direction A: | North |
| Terminus A: | Schleswig |
| Direction B: | South |
| Terminus B: | Itzehoe |
| States: | Schleswig-Holstein |
The Bundesstraße 77 is a German federal road or Bundesstraße and the north–south link between Schleswig, Rendsburg, Hohenwestedt and Itzehoe in the central part of the state of Schleswig-Holstein.
The B 77 begins in the city of Schleswig where the route continues as B 76. South of Schleswig at Busdorf the B 77 is connected via a local road to the A 7 motorway. Then it bypasses Kropp and continues towards Rendsburg. In Rendsburg it has a connection with the B 203 as well as the B 202 with runs with the B 77 through the Rendsburg Tunnel under the Kiel canal. Then the B 77 bypasses Jevenstedt and meets the B 430 in Hohenwestedt. Then it ends in Itzehoe where it meets the B 206[1]