This dataset is part of the DIAMAS project deliverable 'IPSP Database'. The dataset contains a section of the DIAMAS survey where respondents authorised the DIAMAS project to include that information. After data cleaning and manual checking, this dataset contains data for 651 IPSPs. Data from Turkey will be added at a later stage. IPSP names are rendered in various languages. All IPSP URLs were tested with a Google Apps script, resulting in changes to 149 URLs, and the removal of three that did not resolve. IPSPs were further subdivided into ERA regions: Eastern Europe, Northern Europe, Southern Europe, Western Europe, Northern Africa, and Southwest Asia. IPSP responses from outside the ERA are out of scope for the report but included in the dataset in the region 'rest of the world'. The dataset provides the groundwork for the IPSP Registry, due to be delivered in June 2025 as part of DIAMAS Work Package 4: Building capacity through knowledge-sharing. All data are available for reuse under a CC0 license.