Dirty thirty

Dirty thirty may refer to:


 * Dirty 30 (film), a 2016 comedy film
 * Dirty Thirty (album), a 2019 compilation album by Australian rock band The Screaming Jets
 * Dirty thirty (Guantanamo Bay Naval Base), a group of Arab captives in Guantanamo, believed to be Osama bin Laden bodyguards
 * Dirty thirty (NYPD), a 1990s group of NYPD officers suspected of improprieties
 * Dirty thirty (Sellafield), Building B30 at Sellafield, "the most hazardous industrial building in western Europe"
 * Dirty thirty (Vietnam), a group of USAF pilots in the Vietnam War
 * Dirty thirty (WWF), the World Wildlife Federation list of dirty fossil-fueled electric plant
 * Dirty Thirty, a group of rogue agents in the TV series Nikita
 * The Challenge XXX: Dirty 30, the 30th season of the MTV reality competition series, The Challenge