Birmingham City Football Club, an English association football club based in the city of Birmingham, was founded in 1875 under the name of Small Heath Alliance. They first entered the FA Cup in the 1881–82 season. When nationally organised league football in England began, the club, by then called simply Small Heath F.C., was a founder member of the Football Alliance, formed the year after the Football League. In 1892, the Football League decided to form a Second Division, inviting the members of the Football Alliance to join; as one of the less successful members, Small Heath were placed in the Second Division. Since that time the club's first team has competed in numerous nationally and internationally organised competitions, and all players who have played in 100 or more such matches are listed below.
Each player's details include the duration of his Birmingham career, his typical playing position while with the club, and the number of games played and goals scored in domestic league matches and in all senior competitive matches. Where applicable, the list also includes the national team for which the player was selected, and the number of senior international caps he won.