The publication output from nine research institutions from Berlin (Germany) was analysed and the share of open access for journal articles published in 2017 was determined. Journal articles whose authors are affiliated with at least one of the nine institutions were analysed. The data description includes: description of provided files and respective sheets, list of data fields and their source, data re-use cases. The data described here were retrieved from multiple bibliographic databases. Due to license terms raw data from individual databases cannot be provided for download. Data was aggregated, normalised and analysed with a Python script which is available at https://github.com/tuub/oa-eval (code documentation in English). For a detailed description of the retrieval process and the analysis steps see the report (https://doi.org/10.14279/depositonce-7866). Search queries and the respective download settings for these databases are included in the data file.