Modular and Portable Building Association (MPBA)
- An association for the promotion and marketing of the modular and portable building industry. Code of conduct, committees, technical services, member directory and benefits are featured.
- http://www.mpba.biz/

Michigan Manufactured Housing Association (MMHA)
- Nonprofit trade association that supports manufactured housing builders and offers resources and benefits to vendors and home buyers.
- http://www.michhome.org/

Modular Building Systems Association (MBSA)
- Offers resources to manufacturers, suppliers, builders and home buyers, including a members' directory, benefits of modular building, and membership information.
- http://www.modularhousing.com/

School Facility Manufacturers' Association (SFMA)
- The School Facility Manufacturers' Association (SFMA) was formed in 1987 to be an effective voice for the modular building industry in California.
- http://sfma.info/

Modular Building Institute
- Trade association representing manufacturers, dealers and suppliers to the commercial modular industry.
- http://www.mbinet.org/