Many social epistemologists have argued that groups of individuals are able to know and testify propositions that none of their members know or testify. If so, groups can presumably also acquire knowledge on the basis of testimony over and above any testimonial knowledge acquired by their individual members. The problem is that the role of being a testifiee typically involves trusting the testifier, where the relation of trust would seem to obtain only between individuals, in that the normative and affective implications that are characteristic of trust would seem to apply only to individuals. This chapter argues that if, as is plausible, group knowledge and group testimony are irreducible, then groups are also able to enter into testimonial relations of trust over and above any such relations between their individual members. Group trust is thus equally irreducible.