This dataset provides integrated per-capita urban green indicators for the Municipality of Thessaloniki and its municipal districts. The indicators were computed by reusing openly available datasets on tree species distribution, urban green assets, and population statistics. The source datasets were semantically modelled using the RDF Data Cube Vocabulary and transformed into RDF through the CubeModeler integration tool of the Open Data Marketplace (ODM). The harmonized datasets were then integrated into a shared Knowledge Graph and queried via SPARQL to produce aggregated indicators at municipal and district level. The dataset supports evidence-based urban planning, environmental monitoring, and policy analysis by enabling standardized comparison of green infrastructure availability relative to population size across administrative areas.