"Circle House") is a circle-shaped office building located in the Hakaniemi district of Helsinki, Finland.

Ympyrätalo was designed by architects Heikki and Kaija Siren and work lasted eight years.

[6] At the same time Ympyrätalo, as well as the neighboring Kallio administrative building (1965) by the same architects, has been polarizing with its monumentality.

[1] Before completing these buildings the Siren architects had created a small stage for the Finnish National Theatre (1954) as well as being entrusted with the plans for the renovation of Helsinki Cathedral (1961–1963).

It has been suggested that the metro station could be directly connected to Ympyrätalo in the future but these plans have so far been postponed.