The dinner on board the Silver Whisper ship was attended by leaders of the CIS, the European Union, the G8 and prominent world political, cultural and artistic personalities.
Welcoming the guests, Mr Putin said that the anniversary of St Petersburg was a good occasion for a meeting of good friends and neighbours on the banks of the Neva and the Gulf of Finland.
In his brief speech, the Russian head of state praised the residents of St Petersburg stressing that the people were the best treasure of the northern capital.
The President gave a toast to St Petersburg, its prosperity and well-being, and the residents and guests of the city.