Prize money and a trophy. He/she also get the title and a guarantee spot on the Olympiad if there is one that year.
U.S. Open Chess Championship was created in 1900.
Surya Shekhar Ganguly
Lithuanian Chess Championship was created in 1929.
I presume you are asking about the World Chess Championship. There was no World Chess Championship match in 2011.
No...FIDE conducts the World Chess Championship every two years. The World Chess Championship has been undisputed since 2006; the complications of unifying the previously fractured world championship led to World Chess Championship events in 2007, 2008, and 2010. Now that those complications have been resolved, the World Chess Championship will be held every two years. The next match will be in 2012...the challenger for the World Champion (Viswanathan Anand) will be decided at the Candidates Tournament to be held in May 2011. The winner of the 2012 World Championship will defend his title in 2014.
Italian Chess Championship was created in 1921.
Paraguayan Chess Championship was created in 1938.
Japanese Chess Championship was created in 1969.
Argentine Chess Championship was created in 1921.
Commonwealth Chess Championship was created in 1950.
Bulgarian Chess Championship was created in 1933.
Spanish Chess Championship was created in 1928.