Much of the green stormwater infrastructure (GSI) in Baltimore, Maryland, USA, has been installed voluntarily by nonprofits and community groups, yet no comprehensive record of these installations previously existed. We worked with nonprofit stakeholders and Baltimore’s Department of Public Works to compile such a record, using both information provided by these agencies and publicly available data sources such as annual reports and newspaper articles. This dataset includes all voluntary green stormwater infrastructure projects that we were able to identify by the end of 2019, with the first known installation completed in 2001. The dataset includes two data tables, one with project-level information, and one with the locations of individual GSI facilities included in each project.