Big Black River

Length: 330 miles (531 kilometers)

Big Black River is a river in the U.S. state of Mississippi and a tributary of the Mississippi River. Its origin is in Webster County near the town of Eupora in the north central part of the state. From there it flows 330 miles in a generally southwest direction until it merges with the Mississippi River 25 miles south of the city of Vicksburg. It is the major contributor to the Big Black River Basin. It forms the northern border of Claiborne County.

The Big Black River and most of its tributaries are silt-filled. The rivers carry large amounts of suspended sediment, resulting mostly from agricultural runoff. These tributaries are slow-flowing muddy streams. However, some are swift-flowing with sandy bottoms.

The Battle of Big Black River Bridge, fought during the Battle of Vicksburg, was part of the Vicksburg Campaign in the American Civil War.