Weyerhaeuser Company v. United States Fish and Wildlife Service, 586 U.S. ___ (2018), was a United States Supreme Court case. It dealt with the designation of 1544 acres of private land in St. Tammany Parish, Louisiana as "critical habitat" for the dusky gopher frog by the United States Fish and Wildlife Service under the Endangered Species Act of 1973. In a unanimous decision, the Supreme Court vacated the 5th Circuit Court of Appeals decision that upheld the designation and sent the case back for further review.