Since the New Administration perspective was introduced by Dwight Waldo, equity has played a key role in public administration and public policy studies. Much research has focused on employment, politics, jurisprudence, voting and many other issues, while neglecting the role of public services. As gross societal inequities in the world still abound, this article aims at mapping the structure of the knowledge on equity in public services as well as the main conceptualizations and determinants of equity. Quantitative (bibliometrix) and qualitative (narrative) analyses are combined in the analysis of 145 articles from 69 journals. The greatest concentration areas and main drivers of equity (i.e., representative bureaucracy, administrative burden, horizontal and vertical decentralization, privatization, co-production and performance management) are identified. The review contributes to the advancement of social equity in public administration scholarship and practice by improving the conceptual clarity of the term and by mapping the various literature streams.