Diaconia research in the Nordic countries 2015-2019 This master thesis is a systematic literature review of the field of diaconal research in the Nordic countries during the period 2015 - 2019. I have conducted a Mixed Methods Research Synthesis on 134 selected titles, corresponding to the search protocol. Diaconia is sometimes defined as the social work or social care performed by the Christian church, but as my report shows, the concept of Diaconia can be defined in several ways, from narrow to wide delimitations. As a research field, Diaconia research is not clearly defined. One of the findings of my study is that Diaconia research draws from and contributes to ecclesiology, sociology and psychology of religion, systematic theology, church history and patristic studies. The main Nordic research site for diaconal studies is VID Specialized University in Norway. Other major contributors to the field are Uppsala University (CRS), Ersta Sköndal Bräcke University, University of Eastern Finland and MF Norwegian School of Theology, Religion and Society. My report shows recent developments in the theology of Diaconia, and makes visible differences and similarities in the understanding of the Deacon’s office in the Nordic majority churches. Deacons in Finland, Norway and Sweden struggle with similar challenges of mandate and responsibilities, which is shown by comparison between several referenced studies. These challenges appear to be connected to gender, a low over all appreciation of social care in society and church alike, and not the least, outdated theological interpretations of the Deacon’s office as humble or lowly service. Contributions from an international research project at University of Eastern Finland are aiming to correct some of these misunderstandings by retranslating texts from the patristic era. All in all, the referenced studies show, that diaconal works in the Nordic countries are making important contributions to society, expanding beyond the concept of care, engaging in theological development, social innovation, social mobilisation and interreligious cooperation. My study makes a theoretical contribution by adapting the concentric model for Diakonia developed by Erik Blennberger (1946 – 2018), based on this empirical finding.