The 2008 Republican vice presidential nominee and former Alaska governor will provide political commentary for all Fox News outlets, including Fox Business Channel, FoxNews.com and Fox News Radio. Terms of the multiyear deal were not disclosed.
"I am thrilled to be joining the great talent and management team at Fox News. It's wonderful to be part of a place that so values fair and balanced news," Palin said in a statement.
Palin, 44, will not have her own show, but will occasionally host episodes of the Fox News Channel's upcoming Real American Stories, a series that chronicles people who overcame hardships.
Her recent book, Going Rogue, remains No. 2 on The New York Times nonfiction best-seller list.
"Governor Palin has captivated everyone on both sides of the political spectrum and we are excited to add her dynamic voice to the Fox News lineup," Bill Shine, the executive vice president of programming, said in a statement.
Calls and e-mails to Fox News were not immediately returned.