This data package includes salt marsh vegetation data collected as part of the Buzzards Bay Coalition's salt marsh long-term monitoring. The Buzzards Bay Coalition's salt marsh long-term monitoring, which began in 2019, aims to assess and track the condition of salt marsh vegetation, fauna, and elevation. This project monitors 12 different salt marshes distributed across Buzzards Bay, Massachusetts. At each marsh site, about 20 one square-meter plots were monitored in 2019 and 2020. This data package includes stem density and wrack measurements, vegetation height measurements, and the species present in each plot.