
The Commercial Telegraphers Union of America (CTUA) was a United States labor union formed to promote the interests of commercial telegraph operators.

The Communication Workers Union (CWU) is a trade union in South Africa. It was formed in May, 1996 by the merger of the Post Office Employees Association (PEASA), the Post and Telecommunication Workers Association (POTWA) and the South African Post Telecommunication Employees Association (SAPTEA).

The Communication Workers Union of Australia is a trade union in Australia. It is a division of the Communications, Electrical and Plumbing Union of Australia.

The Communication Workers' Union is a trade union representing workers in the printing, communications and entertainment industries in Italy.

Communications Workers of America (CWA) is the largest communications and media labor union in the United States, representing about 700,000 members in both the private and public sectors. The union has 27 locals in Canada via CWA-SCA Canada representing about 8,000 members. CWA has several affiliated subsidiary labor unions bringing total membership to over 700,000. CWA is headquartered in Washington, DC, and affiliated with the AFL-CIO, the Change to Win Federation, the Canadian Labour Congress, and UNI Global Union. The current president is Chris Shelton.

The Media Union was a trade union representing German workers in the printing, paper, journalism and arts.

The Media, Entertainment & Arts Alliance (MEAA), also sometimes referred to as the Alliance, is the Australian trade union and professional organisation which covers the media, entertainment, sports and arts industries.

The National Communications Union (NCU) was a trade union in the United Kingdom.

National Writers Union (NWU), founded on 19 November 1981, is the trade union in the United States for freelance and contract writers: journalists, book and short fiction authors, business and technical writers, web content providers and poets. Organized into 17 local chapters nationwide, it had been Local 1981 of the United Automobile Workers, AFL-CIO since merging with them in 1992. On 11 May 2020, the NWU disaffiliated with the UAW.

The Norwegian Telecommunication Organisation was a trade union representing technical staff at Televerket.

The Norwegian Union of Telecommunication Workers was a trade union representing fitters and delivery workers at Televerket.

The Order of Railroad Telegraphers (ORT) was a United States labor union established in the late nineteenth century to promote the interests of telegraph operators working for the railroads.

The Postal, Telegraph and Telephone International (PTTI) was a global union federation bringing together unions of communications workers worldwide.

T-Mobile Workers United (TU) is an organization of T-Mobile USA and Metro by T-Mobile employees joining together for a voice and fair treatment at work. It represents currently 500 members and is affiliated with the Communications Workers of America (CWA) and Vereinte Dienstleistungsgewerkschaft (ver.di), a large German service-sector union. TU is also supported by a coalition of community and labor groups around the world.

The Union of Communication Workers (UCW) was a trade union in the United Kingdom for workers in the post office and telecommunications industries.