While access to civil-law institutions has been a traditional area of socio-legal research, access to administrative justice still constitutes an underresearched field. In the field of administrative law, public ombuds institutions represent an important pathway to resolve disputes without invoking a court. To date, we have little knowledge about who uses these ombuds institutions and which factors facilitate access to the ombuds. In this paper, on the basis of our survey among users of the Austrian Ombudsman Board (n = 8,274), we explore the effects of institutional design on the user population. The findings suggest that the two outreach measures – regular consultation days and a weekly TV broadcast – contribute to reducing existing inequalities with regard to users’ sociodemographic characteristics.