| NZMSG | |
| Location Country: | New Zealand |
| Affiliation: | NZCTU |
| Full Name: | NZ Merchant Service Guild Industrial Union of Workers |
| Headquarters: | Wellington, New Zealand |
| Key People: | Helen McAra, general secretary |
The NZ Merchant Service Guild Industrial Union of Workers (NZMSG) is a trade union in New Zealand. It represents workers in seagoing ships, as well as the waterfront/ports/shore-based shipping industry, and the passenger/tourism industry.
The NZMSG has 1000 members and is affiliated with the New Zealand Council of Trade Unions and the International Transport Workers' Federation.