U.S.A. (United State of Atlanta) (stylized on the cover as U.nited S.tate of A.tlanta) is the fourth studio album by the American hip hop duo Ying Yang Twins.

Production was handled by Mr. Collipark, who produced the majority of the album, Midnight Black, Homebwoi, Lil' Jon, The Pentagon and member Kaine.

It features guest appearances from Adam Levine, Anthony Hamilton, Anwar, Avant, B.G., Bun B, Countrie Biggz, Da Muzicianz, Homebwoi, Jacki-O, Mike Jones, Pitbull, Teedra Moses, Busta Rhymes, Free Marie, Lil' Scrappy, Missy Elliott and Mr. ColliPark.

[12] AllMusic's David Jeffries wrote: "at 77 minutes and 23 tracks, the sprawling album is weighed down by some filler and redundant numbers, but as a step forward for a party band riding on whatever the Dirty South sound of the moment is, it's surprisingly bold and accomplished".

[9] Christian Hoard of Rolling Stone resumed: "at seventy-seven minutes, their new disc is long on crunked-out filler, but there are plenty of hook-filled bangers and club-ready sex rhymes".