"Nobody Knows Me" is a song by American singer-songwriter Madonna. The song was written and produced by Madonna and Mirwais Ahmadzaï for her ninth studio album American Life (2003). It was released as a promotional single in the United States on October 15, 2003, with a remixed version appearing on the remix compilation Remixed & Revisited (2003). "Nobody Knows Me" carries on the main theme of American Life, with its usage of negative tones on the songs. It is a dance and electronic song, with vocoder effects, spacey synths and a bubbly bass, and lyrically, Madonna rejects tabloid culture's "social disease", denouncing both TV and magazines.

The song received generally favorable reviews from music critics, with many of whom calling it as a highlight from American Life. Four remixes were released in club stations around the United States, with one of them peaking at number four on the US Hot Dance Club Play chart. The song, along with "Nothing Fails", topped the US Hot Dance Singles Sales chart and also charted on the ARIA Club Tracks in Australia. Madonna did a performance of the song alone on stage on her Re-Invention World Tour in 2004. It was also used as a video interlude on The MDNA Tour in 2012, showing Madonna's face morphed with a number of famous figures. French far right politician Marine Le Pen sued Madonna for superimposing a swastika and Adolf Hitler's face with hers.

American Life became Madonna's final studio album with Maverick Records, and marked the end of an eleven-year recording history with the label. In an interview with VH1, Madonna discussed her motivations behind the record discussing her 20 years in the industry and stating that "material things" were unimportant, stating "I look back at the 20 years behind me and I realized that a lot of things that I'd valued weren't important", in response to the non-materialistic themes of the record. The album has been deemed by some as a concept album featuring political themes based around the United States. "[The songs] are examining things I valued and things I found myself worrying about, caring too much about, and realizing that those things aren't important and wanting to get out from underneath that cloud, the world of illusion", Madonna stated. According to Lucy O'Brien, author of Madonna: Like an Icon, the main concept of American Life was about "nothing". This was evident in the titles of the songs like "Nobody Knows Me", usage of "no" in "Love Profusion", as well as "Nothing Fails". Usage of the negative tone led Madonna to be sarcastic on people's assumptions about her and emphasize about her knowledge of romantic love. O'Brien described the concept of the album and the song:

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