Vienna is an unincorporated community inOntario, Canada. It is recognized as adesignated place byStatistics Canada.

In the2021 Census of Population conducted byStatistics Canada, Vienna had a population of 736 living in 235 of its 249 total private dwellings, a change of-4.8% from its 2016 population of 773. With a land area of 2.71 km² (1.05 sq mi), it had a population density of271.6/km² (703.4/sq mi) in 2021.^[1]

• List of communities in Ontario
• List of designated places in Ontario

42°40′51″N80°47′40″W / 42.680703°N 80.794498°W /42.680703; -80.794498