Italy produces the most wine of any country, followed closely by France. Either of them could have the largest total area of wine producing.
In relation to its population, Australia exports the most wine. In absolute volume, it is Italy.
The United States is the fourth largest. In fact California's wine production alone is twice that of the whole country of Australia which is the fifth largest. Every state in the US (even Alaska) produces wine though some of it is not very good.
Canada's Ice Wine
Italy is the largest producer of wine in the world.
Type yourWhat country consumes the most wine per capita?here...
Italy and France
argentina I've no idea if Argentina produces the most grapes in the world, Italy definitly produces the most wine though and France produces the most Champagne, being that it's the only place allowed to produce it!
Although the USA is number four on the overall list is the top new world wine producing country. Australia produces the most per capita.
France
In 2010, France got back its position of first wine producing country in the world after losing it in 2009. Source: http://www.vinivino.com/blog/france-takes-back-the-first-position-as-the-worlds-leading-wine-producer/
The statistics for 2010 haven't been published yet (January, 2011), but the largest wine producer that year was almost certainly Italy.