Abstract: We routinely ascribe belief and knowledge to groups, saying such things as that the government knew that the new strain of covid was especially transmissible, or that the government believed that restrictions on inbound travel to the country weren’t necessary despite the new strain. Many take such ascriptions to be literally true, and there has been much recent work on what it is for a group to have a belief, or for a group belief to be justified or constitute knowledge. Just as in the case of individuals, if groups have beliefs then whether they are justified or constitute knowledge partially depends on their evidence. So it’s important to address the question of what is a group’s evidence. Here, I examine a range of different views about group evidence and argue for an inflationary account of group evidence on which a group’s evidence is not a simple function of the evidence of its members.