Uno Ullberg (1879 in Viipuri – 1944 in Helsinki) was a famous Finnish architect, who worked most of his life in the eastern Finnish city of Viipuri (or Vyborg), after 1944 part of first the Soviet Union and then Russia. The style of his architecture covers the transition in architecture from so-called Nordic Classicism of the 1920s to Functionalism during the 1930s.