The Senior League Baseball Division is for boys and girls 15-16 years old (9th and 10th grade), using a conventional 90-foot diamond with a pitching distance of 60 feet, 6 inches.

The local league has an option to choose a Tournament Team (or "All Stars") of 13-16-year-olds from within this division (and/or from within the Junior League or Big League divisions), and the team may enter the International Tournament.

The culmination of the International Tournament is the Senior League Baseball World Series, featuring teams from around the world. All expenses for the teams advancing to the World Series (travel, meals and housing) are paid by Little League International.

Parents are strongly encouraged to become involved in this teenage division of Little League. After completing a Little League volunteer application and passing a required national background check, parents may become involved in practices, and be eligible as coaches, managers, umpires, local league board members and other volunteer positions within the league.