Green hat

Green hat may refer to:


 * Green hat, in de Bono's Six Thinking Hats
 * Green hat, an ecclesiastical hat for a bishop
 * Green hat, a Chinese term for cuckold
 * Green Hat, a 2004 film
 * Green Hat Films, a film company of Todd Phillips
 * The Green Hat (novel), by Michael Arlen, 1924
 * The Green Hat (play)