Union of the Baltic Cities (UBC) is the leading network of cities in the Baltic Sea Region with Member Cities from Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Norway, Poland, and Sweden. Founded in 1991 in Gdańsk, UBC is a voluntary, proactive network mobilizing the shared potential of its member cities.

UBC works through eight Commissions: Cultural Cities, Inclusive and Healthy Cities, Learning Cities, Planning Cities, Safe Cities, Smart and Prospering Cities, Sustainable Cities, and Youthful Cities.