This article considers one mechanism that could create a clearer accountability path between nonprofits and their beneficiaries: Outcome measurement. Outcome measurement focuses attention on a nonprofit’s beneficiaries and whether they are better off as a result of the nonprofit’s work. The article analyzed 10 outcome measurement guides targeted to nonprofits, totaling more than 1,000 pages of text. The analysis shows that the guides were neither uniform in the conceptualization of nonprofit beneficiaries nor in how they directed nonprofits to use outcome measurement with their beneficiaries. Despite scholars’ suggestion that a nonprofit’s relationship to their beneficiaries is a key accountability relationship, the guides suggest that beneficiaries have an ambiguous standing, relative to other stakeholders, in the nonprofit accountability environment.