The 1962 Major League Baseball season was contested from April 9 to October 16, 1962. The National League (NL) added two teams via expansion, the Houston Colt .45s and New York Mets. This marked the return of the NL to New York City after a four-year absence, although the Mets would lose 120 games and finish in last place. All major league teams now played 162-game schedules, which had been adopted by the American League (AL) the prior season, with each team facing the nine other clubs in the same league 18 times during the season.

The 1962 Major League Baseball expansion was the formation of two new Major League Baseball (MLB) teams for the 1962 season. The Houston Colt .45s and the New York Mets were added to the National League (NL), becoming the 19th and 20th teams in MLB's two leagues. The Colt .45s were the first major league team in Houston while the Mets filled the void left when the New York Giants and Brooklyn Dodgers of the NL moved to California after the 1957 season.