Look up IWW in Wiktionary, the free dictionary.
IWW, or Industrial Workers of the World (known as the Wobblies), are an international union founded in 1905.
IWW may also refer to:
- Industrial WasteWater (see Industrial wastewater treatment )
- Inland waterway, a navigable river, canal, or sound
- Irish Whip Wrestling, an Irish-owned independent professional wrestling promotion established in 2002