"21st Century Girl" is a song by American musician Willow Smith, released on March 1, 2011 through Roc Nation as a standalone single.

21st Century Girl is an upbeat dance song and was produced by Swedish production team Twin.

Willow performed the song on The Oprah Winfrey Show, as well as at the 2011 Kids' Choice Awards.

The song was also performed by Willow as a support act on UK dates of Justin Bieber's My World Tour.

The video was released on March 7, 2011, and shows Cicely Tyson playing a nomadic tribal woman pulling Willow from the sand in a desert.