"Us Against the World" is a song by Irish boy band Westlife from their eighth studio album Back Home (2007). The song was released as the album's second single on 3 March 2008.

Westlife are an Irish pop group formed in Dublin in 1998. The group consists of members Shane Filan, Mark Feehily, Kian Egan, and Nicky Byrne. Brian McFadden was a member before leaving in 2004. The group disbanded in 2012 after 14 years and later reunited in 2018.