| Union | Abbreviation | Founded[7] | Membership (1947) |
| African Cement Workers' Union | | | 147 |
| African Commercial and Distributive Workers' Union | | | 375 |
| African Sweet Workers' Union | | 1937 | 325 |
| Agricultural Workers' Federation | | | 1,057 |
| Amalgamated Bricklayers' Trade Union of South Africa | | | 1,225 |
| Amalgamated Engineering Union | AEU | 1893 | 7,608 |
| Amalgamated Society of Woodworkers | ASW | 1881 | 3,793 |
| Brewery Employees' Union | | 1929 | 225 |
| Building Workers' Industrial Union | BWIU | 1916 | 7,334 |
| Cape Explosive Industrial Workers' Union | | 1927 | 225 |
| Cape Furniture Workers' Union | | | 1,250 |
| Cape Meat Trade Employees' Union | | | 199 |
| Cape Mineral Water Workers' Union | | | 138 |
| Cape Plywood Workers' Industrial Union | | | 135 |
| Cape Saw Mill Workers' Union | | | 150 |
| Cape Town Gas Workers' Union | | | 60 |
| Cape Town Lift Operators' Union | | | 11 |
| Cape Western District Bespoke Tailors' Union | | | 300 |
| Chemical and Allied Workers' Union | | | 259 |
| Chemical Workers' Union | | 1943 | 180 |
| Concession Stores and Allied Trades Assistants' Union | | 1926 | 668 |
| Durban Indian Municipal Employees' Society | DIMES | 1936 | 1,801 |
| Durban Municipal Transport Employees' Union | | 1926 | 500 |
| East London and Border Furniture Workers' Union | | | 145 |
| East London Transport Workers' Union | | | 84 |
| Explosive and Fertiliser Workers' Union | | | 750 |
| Food and Canning Workers' Union | FCWU | 1941 | 2,025 |
| Food, Canning and Allied Workers' Union | | | 540 |
| Furniture Workers' Industrial Union (Natal) | | 1930 | 807 |
| Furniture Workers' Industrial Union (Transvaal) | FWIU | 1925 | 1,610 |
| Garment Workers' Industrial Union | GWIU | 1934 | 2,180 |
| Garment Workers' Union | GWUSA | 1909 | 11,870 |
| General Building Workers' Union | | | 135 |
| Glass Workers' Union | GWU | 1943 | 359 |
| Glass Manufacturing Workers' Union | | | 56 |
| Hotel, Bar and Catering Trade Employees' Union | HB&CTEA | | 1,050 |
| Iron Moulders' Society of South Africa | IMS | 1896 | 1,182 |
| Jewellers' and Goldsmiths' Society | J&G | 1939 | 180 |
| Johannesburg Municipal Transport Workers' Union | JMTWU | 1935 | 1,750 |
| Match Workers' Union | | 1944 | 93 |
| Match Workers' Industrial Union | | | 150 |
| Mineral Water Workers' Union | | 1944 | 75 |
| Motor Industry Employees' Union | MIEU | 1939 | 4,753 |
| Natal Liquor and Catering Trade Employees' Union | NL&CTEU | 1928 | 875 |
| Natal Sugar Industry Employees' Union | | 1938 | 887 |
| National Baking Industrial Union | | 1927 | 354 |
| National Union of Laundering, Cleaning and Dyeing Workers | NULCDW | 1940 | 575 |
| National Union of Commercial Travellers | | 1937 | 1,274 |
| National Union of Distributive Workers | NUDW | 1936 | 7,420 |
| Oil and Petrol Employees' Union | | | 944 |
| Operative Plasterers' Trade Union of South Africa | | | 248 |
| Optical Workers' Union | | | 59 |
| Picture Framing Workers' Industrial Union | | | 9 |
| Port Elizabeth Non-European Municipal Workers' Union | | | 193 |
| Port Elizabeth Tram and Bus Workers' Union | | 1930 | 329 |
| Pretoria Liquor and Catering Trade Employees' Union | | 1925 | 160 |
| Pretoria Municipal Tram and Bus Workers' Union | | 1942 | 329 |
| Pretoria Retail Meat Trade Employees' Union | | | 92 |
| Public Service and Provincial Council Workers' Union | | | 796 |
| Rope and Mat Workers' Industrial Union | | 1937 | 177 |
| Shoe and Leather Repairer Workers' Union (Cape) | | | 97 |
| Shoe and Leather Repairer Workers' Union (Port Elizabeth) | | | 27 |
| South African Association of Municipal Employees | SAAME | 1919 | 7,519 |
| South African Boilermakers' Society | SABS | 1916 | 2,501 |
| South African Canvas and Rope Workers' Union | SAC&RWU | 1926 | 180 |
| South African Canvas and Rope Workers' Union (Cape) | | | 35 |
| South African Electrical Workers' Association | SAEWA | 1939 | 3,784 |
| South African Engine Drivers' and Firemen's Association | SAED&FA | 1894 | 2,616 |
| South African Hairdressers' Employees' Industrial Union | SAHEIU | 1944 | 1,788 |
| South African Iron and Steel Trades Association | ISTA | 1936 | 1,788 |
| South African Mine Workers' Union | MWU | 1902 | 17,500 |
| South African Reduction Workers' Association | SARWA | 1924 | 2,500 |
| South African Society of Bank Officials | SASBO | 1916 | 5,300 |
| South African Tin Workers' Union | SATWU | 1939 | 1,843 |
| South African Typographical Union | SATU | 1898 | 7,088 |
| Sweet Workers' Union | SWU | 1926 | 1,843 |
| Tailoring Workers' Industrial Union | | 1934 | 725 |
| Tea, Coffee and Chicory Industry Employees' Union | | 1943 | 94 |
| Tea, Coffee and Chicory Industry Employees' Union (Cape) | | | 67 |
| Textile Workers' Industrial Union | TWIU | 1935 | 1,625 |
| Timber Workers' Union | | | 75 |
| Tin Workers' Union | | | 263 |
| Tobacco Workers' Union | | 1928 | 1,005 |
| Tramway and Omnibus Workers' Union | TOWU | | 933 |
| Transvaal Explosives and Chemical Workers' Union | | 1925 | 480 |
| Transvaal Leather and Allied Trades Industrial Union | TL&ATIU | 1928 | 1,651 |
| Transvaal Retail Meat Trade Employees' Union | | 1938 | 410 |
| Trawler and Line Fishermen's Union | | | 175 |
| Twine and Bag Workers' Union | | 1942 | 113 |
| Umbogintwini Industrial Workers' Union | | | 72 |
| Wholesale Meat Factory and Cold Storage Workers' Industrial Union | | | 58 |
| Witwatersrand Banking Employees' Association | | 1934 | 420 |
| Witwatersrand Liquor and Catering Trade Employees' Union | Wit Liquor | 1926 | 370 |
| Witwatersrand Taxi Drivers' Union | | 1941 | 97 |
| Witwatersrand Tea Room, Restaurant and Catering Trade Employees' Union | | 1930 | 994 |