Individuals often invoke the moral rights that they hold as members of certain groups or social categories. Yet, there is ambiguity in both terminology and theorizing surrounding the nature of those rights. Focusing on the paradigmatic case of disabled people’s right to reasonable accommodations, this paper develops a descriptive account of those group-related rights, as a distinct category of rights which I call ‘membership rights’. Membership rights neither fit the concept of ‘human rights’, as not all people hold them, nor are they typical ’group rights’, as they are held by members of some group as individuals, not by groups collectively. In addition, the grounding of membership rights is linked to the distinct features of group members, be it their special interests or special circumstances. Finally, the content of membership rights includes distinct entitlements and correlating duties, which are not secured by human rights, group rights, or any combination thereof. Recognizing the distinct features of membership rights may have practical implications by strengthening efforts to secure legal protection to membership rights. It also invites further theoretical inquiry, for example, towards identifying other specific rights that fit into this category.