The lawsuit was filed Monday in Washington, D.C.
Alaska Governor Sarah Palin contends the decision is not based on the best scientific and commercial data.
Palin claims the federal analysis did not adequately consider polar bear survival through earlier warming periods.
Interior Secretary Dirk Kempthorne announced the listing on May 14th. He said sea ice habitat has dramatically melted and computer models suggest the trend will continue.
Alaska objects to the conclusion that polar bears could be endangered within the ``foreseeable future.'