Maryland Nurses Association
- Union representing Registered Nurses in the state of Maryland.
- http://www.marylandrn.org/

American Federation of Teachers (AFT) Maryland
- Representing educators throughout the state and providing information on legislation, board and staff, membership, local unions, and news.
- http://md.aft.org

Maryland Professional Employees Council/FPE
- Union council for professional public employees.
- http://md.aft.org/mpec/

UNITE! Mid Atlantic Regional Joint Board
- Council of the Union of Needletrade, Industrial and Textile Employees located in Gaithersburg, MD.
- http://unitemd.org/

Communications Workers of America Local 2101
- Union representing approximately 2400 workers in the Baltimore area who are employed by Bell Atlantic, Bell Atlantic Communications & Construction Services, Inc. (BACCSI), AT&T, Lucent Technologies, Hudson General and the Community Colleges of Bal
- http://www.cwa2101.org/

Maryland State Lodge Fraternal Order of Police
- Includes auxiliary information, benefits, death notices and memorials, board of directors, and events.
- http://www.mdstatefop.org/

Maryland State Teachers Association
- Union representing public school teachers in the state of Maryland. Affiliated with the National Education Association.
- http://www.mstanea.org/

CWA Local 2390
- Represents Lucent Technology workers in Baltimore.
- http://www.cwa2390.com/

AFSCME Council 92
- Labor union representing state and higher education employees in state.
- http://www.afscmecouncil92.org/

UFCW Local 400
- Representing 40,000 workers in Maryland, Virginia, West Virginia, the District of Columbia and Tennessee working in the food processing, retail, poultry and textile industries. Office at Landover, MD.
- http://www.ufcw400.org/

Teamsters Local 570
- Represents warehouse and other workers affiliated with the Teamsters. Located in Baltimore, MD.
- http://www.team570.com/

Washington-Baltimore Newspaper Guild
- Union representing newspaper workers at the Washington Post, Baltimore Sun, Agence France Press, Catholic News Services, the Bureau of National Affairs Correspondents, the Bureau of National Affairs and other workplaces in Baltimore and Washington, DC. Af
- http://www.wbng.org/

CWA Local 2108
- Represents unionized workers in Landover, MD., employed at Bell Atlantic, BASSCI, AT&T, Lucent Technologies as well as staff at the American Federation of Teachers.
- http://www.cwalocal2108.org/

APWU Local 4321
- Represents postal workers in the Salisbury area of Maryland covering the eastern shore of the state.
- http://www.intercom.net/user/apwu4321/

Maryland Public Employees, Council 67
- Represents public employees in Maryland affiliated with AFSCME.
- http://www.afscme67.org/