IWGB may refer to:

• Independent Workers' Union of Great Britain
• Industrial Workers of Great Britain

• John Morrell & Co.
• John Morrell & Company
• John Morrell (rugby league)
• John Morrice
• John Morrice (Australian politician)
• John Morrice (politician)
• John Morris (anthropologist)
• John Morris (anthropologist and author)
• John Morris (businessman)
• John Morris (Conservative politician)
• John Morris Marsden
• John Morris (mountaineer)
• John Morrison (Australian footballer)
• John Morrison (Australian musician)
• John Morrison (author)
• John Morrison (basketball)
• John Morrison (blacksmith)
• John Morrison Caie
• John Morrison (Canadian politician)
• John Morrison (cricketer, born 1892)
• John Morrison (drummer)
• John Morrison (priest)
• John Morrison (songwriter)
• John Morrison (writer)
• John Morris (piper)