This report is a supplement to The European landscape of institutional publishing - A synopsis of results from the DIAMAS survey, DOI: https://doi.org/10.5281/zenodo.10551710. It contains reports on all countries surveyed as part of the DIAMAS IPSP landscape report (Institutional Publishing in the ERA: results from the DIAMAS survey. D2.3 Final IPSP landscape Report, 2023). The country reports draw on the 685 valid responses to the DIAMAS survey conducted between March and May 2023. This represents data from 43 countries in the ERA. These country reports are an attempt at describing a snapshot of the landscape of institutional publishing in Europe based on analysis of the data collected in the survey sample. It is hoped that the reports will promote understanding of the diversity across Europe, and that it can help point to areas that need attention, and questions that need further investigation.