The World Series Trophy is awarded each year by Major League Baseball to the team winning the World Series. Recent trophy designs consist of 30 flags representing the 30 teams in North America's two top leagues, the National League and the American League.

The 2004 trophy was made of brass and pewter, weighs 30 pounds (14 kg) and has an estimated value of $15,000.

The trophy, which is technically known as the Commissioner's Trophy is presented to the ownership of the World Series-winning team by the commissioner. Unlike the Stanley Cup, which is awarded to the champions of the National Hockey League, a new World Series Trophy is created each year.

The current trophy, which was redesigned slightly in 1999, is 24 inches tall, excluding the base, and 11 inches around. It weighs approximately 30 pounds and is made of sterling silver. The trophy features 30 gold-plated, hand-furled flags, one for each of the Major League teams, which rise above an arched silver ox baseball with latitude and longitude lines that symbolize the world. The baseball also contains 24-karat vermeil baseball stitches. The baseball itself weighs over 10 pounds. The base contains an inscription and the signature of the commissioner.

The trophy was first awarded in 1967, when the Cardinals defeated the Red Sox in seven games in Boston's first World Series appearance in 21 years (the Red Sox also lost to the Cardinals in seven games in 1946).

The latest trophy, in 2005, has been awarded to the Chicago White Sox of the American League. The front design has been changed slightly from the last modification in 1999, now having two different size bases.

It is the only "major" American sport in which the championship trophy is not named after someone (contrasting with the Stanley Cup, Vince Lombardi Trophy and Larry O'Brien Trophy)

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