According to research, union workers make, on average, 15 percent more than nonunion workers.

Union Workers

Employees who are members of a labor union, an organization that represents workers' interests in negotiations with employers concerning wages, hours, and working conditions.

Nonunion Workers

Nonunion workers are employees who are not members of a labor union and therefore not covered by union-negotiated collective bargaining agreements, affecting their negotiation power for wages and benefits.