| ONSLG | |
| Location Country: | Guinea |
| Affiliation: | ITUC |
| Full Name: | National Organization of Free Unions of Guinea |
| Native Name: | Organisation Nationale des Syndicats Libres de Guinée |
| Headquarters: | Conakry, Guinea |
| Key People: | Yamoudou Toure, secretary general |
The National Organization of Free Unions of Guinea (ONSLG) is a national trade union center in Guinea. It is affiliated with the International Trade Union Confederation.