The following cities have each hosted the Winter Olympics twice:
St. Moritz, Switzerland (1928, 1948)
Lake Placid, New York (1932, 1980)
Innsbruck, Austria (1964, 1976)
Paris
London, United Kingdom is the host city of the 2012 Olympic Games.
Seoul was the first city to host the Summer Olympic Games. In 1806.
Mexico City
London
London
Stockholm
None
Paris
None
London
Helsinki