Wilhelmina Johanna Maria "Willemijn" Aerdts (born 21 April 1983) is a Dutch academic and politician of the Democrats 66 (D66), who has served as State Secretary for the Digital Economy and Digital Sovereignty in the Jetten cabinet since 23 February 2026. She previously served as a member of the Senate between 2023 and 2026, and was a lecturer and researcher at the Institute of Security and Global Affairs of Leiden University.