Baseball PEI is the provincial governing body for baseball in Prince Edward Island. It is a member of Baseball Canada and Baseball Atlantic.

Baseball was introduced to Prince Edward Island during the late 19th century and early 20th century, often by natives of Prince Edward Island who went to the United States to work, returning to or visiting Prince Edward Island. The first provincial championship was in 1896 when Charlottetown defeated the Pisquid club. After this point, the Maritime Amateur Athletic Association loosely organized provincial play-downs and championships to determine those teams representing Prince Edward Island at Maritime championships. On Prince Edward Island, organized and semi-organized leagues formed by the 1920s in various pockets of Prince Edward Island, especially in Kings County, Charlottetown, Summerside and western Prince County, and the health and popularity of these leagues ebbed-and-flowed through the pre- and post-war decades.

In 1964–65, the Prince Edward Island Amateur Baseball Association (PEIABA) was formed to take over the organizing of provincial play-downs and championships in order to determine the Prince Edward Island representatives at Maritime and National championships. Shortly after this time, the PEIABA began organizing county leagues. In 1969, the PEIABA took the responsibility of organizing and fielding a provincial representative for the quadrennial Canada Summer Games; and in 1989, also took on the responsibility of fielding the PEI Youth Selects, the Prince Edward Island representative at the Baseball Canada Cup. After this point, all teams that represented Prince Edward Island in a Maritime, Atlantic and National championship were determined by the PEIABA.

By the mid-1990s, the provincial government and other sectors required more organization from the PEIABA. On 12 September 1997, the PEIABA became a not-for-profit organization within the province of Prince Edward Island and changed its name to "Baseball PEI". Since that time, Baseball PEI has grown significantly. On top of running Elimination tournaments, provincial jamborees and championships, and fielding and organizing provincial teams, Baseball PEI now offers province-wide leagues from 9U/Junior Mosquito to 21U/Junior (with the Intermediate Kings County Baseball League also a member). Baseball PEI also is heavily involved with grassroots baseball; it assists associations with the set-up of Rally Cap and runs Rally Cap Jamborees. As well, Baseball PEI has the Summer Clinic Program, where teams and members of Baseball PEI can have two clinicians come out and run a clinic on a baseball skill (in 2018, there were 68 clinics run across Prince Edward Island).

Due to Baseball PEI's efforts at the grassroots level, and its dedication to improving the skills and enjoyment of its members, it has been named Baseball Canada's "Province of the Year" in 2013 (in which it shared with Baseball Ontario) and in 2015.

Baseball PEI is a non-profit organization that continuously enables the development of baseball skills and knowledge among youth across Prince Edward Island.

Baseball PEI has a Board of Directors that makes rules, policies and procedures concerning the managing of affairs, discipline, and operation of Baseball PEI teams, associations and competitions. The Board of Directors of Baseball PEI is as follows:

There are eleven minor baseball associations across Prince Edward Island that make up Baseball PEI: