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Federal unions are at the center of labor's recent and surprising resurgence. Here's a look at the top 20 by number of employees represented, not including postal organizations. Not all those represented are dues-paying union members.
| Union |
Employees Represented |
|
|---|---|---|
| 1. | American Federation of Government Employees | 591,846 |
| 2. | National Treasury Employees Union | 145,166 |
| 3. | National Federation of Federal Employees | 69,056 |
| 4. | National Association of Government Employees | 41,882 |
| 5. | International Federation of Professional and Technical Engineers | 23,390 |
| 6. | Association of Civilian Technicians | 22,203 |
| 7. | National Air Traffic Controllers Association | 19,405 |
| 8. | International Association of Machinists and Aerospace Workers | 18,504 |
| 9. | Metal Trades Department | 18,315 |
| 10. | Laborers International Union of North America | 16,832 |
| 11. | Professional Airway Systems Specialists | 11,340 |
| 12. | Service Employees International Union | 9,414 |
| 13. | American Federation of State, County and Municipal Employees | 8,972 |
| 14. | Indian Educators Federation | 7,764 |
| 15. | Federal Education Association | 7,657 |
| 16. | American Nurses Association | 5,629 |
| 17. | International Association of Firefighters | 4,744 |
| 18. | National Weather Service Employees Organization | 4,270 |
| 19. | International Brotherhood of Electrical Workers | 3,419 |
| 20. | Patent Office Professional Association | 2,774 |
Source: OFFICE OF PERSONNEL MANAGEMENT
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