Citi Field is a baseball stadium located in Flushing Meadows–Corona Park, in the borough of Queens, New York City, United States. Opening in 2009, Citi Field is the home ballpark of Major League Baseball (MLB)'s New York Mets. The stadium was built as a replacement for the adjacent Shea Stadium, which had opened in 1964.

A ballpark, or baseball park, is a type of sports venue where baseball is played. The playing field is divided into two field sections called the infield and the outfield. The infield is an area whose dimensions are rigidly defined in part based on the placement of bases, and the outfield is where dimensions can vary widely from ballpark to ballpark. A larger ballpark may also be called a baseball stadium because it shares characteristics of other stadiums.