How many states have collective bargaining?

All 50 states have collective bargaining, it is one of your rights that are protected by Federal law!

For public employees, this answer is not correct. Collective bargaining for public sector employees is not guaranteed by Federal Law. It is instead governed by each state separately. Currently, collective bargaining for state employees is illegal in 5 states. In 35 states it is required, and in 11 states it is allowed but not required. 9 states are currently considering legislation that would remove collective bargaining rights from their public employees. For more information, visit http://www.nctq.org/tr3/scope/.