The Club Sport Boys Association, commonly referred to as the Sport Boys or simply the Boys, is a Peruvian association football club based in Callao, Peru, founded on 28 July 1927. The club currently participate in the Peruvian Primera División, the top tier of Peruvian football, and are based in Estadio Miguel Grau alongside two other clubs in Callao, Academia Cantolao and Universidad de San Martín de Porres. Their biggest rivalry is with Atlético Chalaco, known among fans as the Clásico Porteño.

The Sport Boys are historically considered the fourth most prominent club of Peruvian football with 6 national titles and the most continental appearances after Lima's big three clubs, the Club Universitario de Deportes, the Sporting Cristal and Club Alianza Lima. Their most recent title was in 1984, where they beat Colegio Nacional Iquitos to qualify for the 1985 Copa Libertadores. This was the first title in the professional era of Peru's top flight.

The Boys' original uniform had red and yellow stripes before they switched to the current pink and black color scheme. They are also the first football club in Peru to feature cheerleading.

The Sport Boys was founded on 28 July 1927 by a group of young football fans in Callao, who wanted to help one Gualberto Lizárraga start his own club. The day before Independence Day in Peru, 27 July, the group held a meeting, sang the national anthem and at midnight proclaimed the club's foundation, with Lizárraga as president.

The Sport Boys participated in the Provincial League of Lima and Callao from 1929 to 1932 (finishing third in 1930 and runners-up in both 1931 and the 1932 Intermediate Division), managing to ascend to the first category of national football, called the Honor Division at that time. A few years after being promoted to the Peruvian Primera División, they won their first national title, winning the 1935 Peruvian Primera División undefeated, eight points ahead of their closest competitor. Two years later, the club won the First Division again in 1937 and the year after became runners-up after losing to Universitario. They went trophyless until 1942 with yet another league title.

In 1951, after having finished second the year before, the Sport Boys won their first national league title in the professional era and their fourth overall. In 1958, Marcos Calderón became their as head coach. He would bring the Boys to win their fifth title in 1958 and eventually led the Peruvian national team to win the 1975 Copa América.

After finishing second place in the 1966 Torneo Descentralizado, the Sport Boys qualified for the newly-created Copa Libertadores in 1967 but were eliminated in the first round. The club won their most recent title in 1984. Before 1984, they came second in the First Division five times, in 1952, 1959, 1960, 1966 and 1976. After winning the 1985 Torneo Descentralizado, the Boys qualified for the Copa Libertadores once again in 1985 and reached the quarter-finals, a feat they previously achieved in 1977 after becoming runners-up of the 1976 Torneo Descentralizado.

The Sport Boys was going through an economic crisis and a long drought of titles. The club was relegated to the Peruvian Segunda División in 1987 and stayed for two years, until they won the 1989 tournament and got promoted back to the First Division. They won the Torneo Regional in 1990 and qualified for the 1991 Copa Libertadores. The Sport Boys qualified for the next edition as well. They were eliminated in the first round in both editions.