This paper presents a knowledge graph describing the Members of Parliament in Finland and related actors in politics, extracted from the databases and textual descriptions of the Parliament of Finland. The data has been interlinked internally and enriched with data linking to external data sources according to the 5-star Linked Data model. The data has been published together with its schema for better re-usability and is being validated using ShEx. The knowledge graph presented is integrated with another knowledge graph about over 900 000 parliamentary plenary speeches in Finland (1907–) to form a larger parliamentary LOD publication (FinnParla) of the Parliament of Finland. The data is being used for Digital Humanities research on parliamentary networks, culture, and language.