The Garment Workers' Union of South Africa (GWU) was a trade union representing workers in the clothing industry in South Africa. The union was founded in 1909, as the Witwatersrand Tailors' Association, and its initial membership was focused on white master tailors and middlemen. In 1925, it established a section to represent factory workers in the industry, and this proved enormously successful; by the end of 1926, it represented 90% of clothing factory workers in the Witwatersrand region. That year, it also began representing "coloured" and Indian workers.