Which court would review a case appealed from US District Court?

A case appealed from a U.S. District Court would be reviewed by the U.S. Court of Appeals for the circuit in which the District Court is located. For example, if the case originated in the Southern District of New York, it would be appealed to the Second Circuit Court of Appeals. The Court of Appeals reviews the case for legal errors and can affirm, reverse, or remand the decision of the District Court.