For their latest effort, the singers collaborated with numerous celebrated producers and songwriters, such as T-Pain, Max Martin, RedOne, Soulshock and Karlin, Jim Jonsin and Claude Kelly.
"The end result is an indelible and finely crafted R&B and pop album from four talented musicians who love what they do and who maintain the rare relevance in an industry that often disposes of pop acts," the group's record label said in a news release.
"Us" is slated to drop Oct. 6.
"We're really excited to release this new album and know that our fans are excited, too. We worked with a group of amazing artists and producers that we've never worked with before, exploring new sounds and territory and know the final product turned out incredible," Carter said in a statement.
Backstreet Boys said they plan to spend the second half of 2009 and all of 2010 on the road. A European tour has already been announced and a full North American headlining tour will be announced shortly, the group said.