The Canadian Merchant Service Guild
- National association of masters, mates, pilots, engineers and other marine officers.
- http://www.cmsg-gmmc.ca

Maritime Union Of Australia
- MUA represents 10,000 Australian stevedoring workers, seafarers and, as a key affiliate of the International Transport Workers' Federation, 320,000 of the world's seafarers.
- http://www.mua.org.au/

Connecticut Maritime Coalition
- A non-profit association facilitating the competitiveness of Connecticut's maritime industries. Our cluster network is mostly composed of small and medium-sized business. Together, our group has reached a consensus on the issues facing the maritime indust
- http://www.ctmaritime.com

IUOE Local 25 Marine Division
- Operating Engineers Marine Division. Information and member resources
- http://www.iuoelocal25.org

Atlantic Maritime Officers Association
- AMOA is and independent union dedicated to representing the shipboard officers of Arco Marine.
- http://www.a-m-o-a.org/

Deep Sea Fishermen's Union of the Pacific
- An independent union and the oldest organization of crewmen and skippers in the North Pacific. Composed of longliners who fish primarily in the Gulf of Alaska and the Bering Sea and who have a working agreement with the Fishing Vessel Owners' Association
- http://www.dsfu.org/

Sailors Union of the Pacific
- A union of unlicensed sailors that work in the deck, engine, and steward's departments in U.S.-flag vessels under contract to the Union. The SUP also has collective bargaining agreements with U.S.-flag companies where licensed personnel are also represent
- http://www.sailors.org

International Organization of Masters, Mates and Pilots
- Represents licensed deck officers, state pilots and other marine personnel on U.S. flag commercial vessels sailing in international and inland waterways as well as crews sailing civilian-crewed military vessels of the United States.
- http://www.bridgedeck.com/

International Ship Masters' Association
- A Great Lakes maritime guild 1886, promoting safety in the profession and expressing concerns in maritime navigation, engineering and legislative issues.
- http://www.shipmaster.org

International Transport Workers' Federation
- Global organisation of transport workers' unions. The ITF brings together some 533 unions in more than 136 countries in every part of the world, and representing over 5 million trade union members in every branch of transport.
- http://www.itf.org.uk/