The Bundesstraße 71 (abbr: B 71) is one of the longer German federal roads, numbered in the 60s and 70s series.

It begins at the B 6 in Bremerhaven by the Unterweser and ends in Könnern near Halle (Saale) in Saxony-Anhalt.

Here, it crosses the B 75 and continues past the Lüneburg Heath to Soltau (133 km), where it intersects with the B 3.

As it moves eastward, the road passes through heathland to Uelzen (190 km), where it again intersects another major federal route, the B 4.

It continues for another 56 km as part of the Romanesque Road (Straße der Romanik) through the heart of the Anhalt region until, at Könnern, it reconnects with the B 6, the road it originally left at Bremerhaven, 26 km before Halle, the largest city in Saxony-Anhalt.