PS3 gaining ground
Sony also sold 1.4 million PlayStation Portable handheld machines in the region during the same period, from November 23 to December 31, Sony Computer Entertainment has stated.
Sony, which faces fierce competition from rival Nintendo, slashed $100 from its top model PS3 consoles in the United States and introduced a cheaper, slimmed down version ahead of the crucial year-end sales period.
"The PlayStation brand ended the year in a very strong position and clearly indicates more positive momentum going into 2008," Jack Tretton, head of Sony's US games unit, said in a statement.
PS2 still popular
The PlayStation 2 also continued to enjoy brisk demand with sales of 1.3 million machines between November 23 and December 31, Sony said.
Sony previously dominated the home video-game market and shipments of the original version and the PlayStation 2 have both topped 100 million each.
However, it has fallen badly behind Nintendo with its hit Wii console, which is much cheaper than the PS3 and designed to appeal to a wider audience.
Sony has also announced that it teamed up with Skype to enable users of its new slim PlayStation Portable hand-held video game machine to make free or low cost telephone calls around the world.
After a software update that will be available from late January, PSP-2000 users will be able to chat for free to other Skype users and, for a charge, call landlines and mobile phones anywhere in the world, Sony said.
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