Sisse Marie Welling

Sisse Marie Welling is a Danish politician who has served as the Lord Mayor of Copenhagen since January 1, 2026. A member of the Socialist People's Party, she made history as the first non-Social Democrat to hold the office in over a century. Welling was first elected to the Copenhagen City Council in 2009 and previously served as the city's alderman for health and care from 2018 to 2025. She holds a master's degree in history from the University of Copenhagen.