"Nobody's Supposed to Be Here" is a song by Canadian recording artist Deborah Cox, released as the lead single from her second studio album, One Wish (1998). Written by Montell Jordan and its producer, Anthony "Shep" Crawford, the song was released on the same day as the album, on September 15, 1998, by Arista Records. It is Cox's most successful song, peaking at number two on the Billboard Hot 100 for eight weeks and spending a then-record 14 weeks at number one on the Hot R&B Singles & Tracks chart. In 2017, Billboard ranked the song at number five on its "Greatest of All Time Hot R&B/Hip-Hop Songs" chart.

Deborah Cox is a Canadian singer, songwriter, actress, and record producer. Born and raised in Toronto, she began performing on television commercials at age 12, and entered various talent shows in her teenage years before becoming a professional backing vocalist for Celine Dion. In 1994, Cox relocated to the United States and was signed to Arista Records by Clive Davis, releasing her self-titled debut album the following year. Her second studio album, One Wish (1998), was certified platinum in the United States. It was marked by the commercial success of the pop crossover single "Nobody's Supposed to Be Here", which would become her most successful entry on the Billboard Hot 100 chart, peaking at number two and remaining there for eight consecutive weeks. Cox signed with J Records for her third studio album The Morning After (2002), which saw moderate commercial success.