Craft unionism refers to a model of trade unionism in which workers are organised based on the particular craft or trade in which they work. It contrasts with industrial unionism, in which all workers in the same industry are organized into the same union, regardless of differences in skill.

Under this approach, each union is organized according to the craft, or specific work function, of its members. For example, in the building trades, all carpenters belong to the carpenters' union, the plasterers join the plasterers' union, and the painters belong to the painters' union. Each craft union has its own administration, its own policies, its own collective bargaining agreements and its own union halls. The primary goal of craft unionism is the betterment of the members of the particular group and the reservation of job opportunities to members of the union and those workers allowed to seek work through the union's hiring hall.