Plain clothes

Plain clothes may refer to:


 * Plainclothes law enforcement
 * Plain Clothes (1925 film), a silent black and white short American film
 * Plain Clothes (1988 film), an American comedy film
 * Plain Clothes Theatre Productions, a theatre company based in Bristol, England
 * Plainclothes (TV series), a 1990s New Zealand crime drama series
 * Plain dress, a religious practice of wearing clothes of traditional, modest design