The beginning

In 1895 Cavanagh, Geogeham, Kenny and O’Farrel were just a group of boys who wanted to form a football team, but they had no money. On July 28, 1895, they met in the Hipódromo Argentino de Palermo and founded the "Club Atlético Capital" designing Tomas Hagan as president. A few months later, those immigrants bet the money they had saved to a horse called Porteño, which finally won the race paying a hugh amount of money.

With the money won in the race, the boys bought the equipment necessary to play football: balls, jerseys, shorts, socks and shoes and they renamed the club as a tribute to that horse, so "Club Atlético Porteño" was the name chosen.^[3]

The football years (1907–31)

The football team debuted in the top division, Primera División, in 1907,^[4] where it played until 1928 when the club was relegated to Segunda División.^[5]

The first Porteño stadium was located on Alvear (current Del Libertador) avenue and Godoy Cruz in Palermo. Nevertheless, the National Government expropriated the land to build the "Industrial Pavillion" there, as part of the celebrations of the 100th. anniversary of the May Revolution in 1910. Porteño moved to a land on Valentín Alsina avenue, near Hipódromo Argentino, also in Palermo. Its stadium was the first (in the city of Buenos Aires) to have its official stands built in concrete. In 1931 Porteño disaffiliated from the Football Association, due to the club refused to participate in a professional league, being the team subsequently disbanded.

Porteño's football team won a total of 2 championships between 1912 and 1914^[6] and two Copa de Competencia Jockey Club, in 1915 ^[7] and 1918.^[3][8]

The rise of rugby

Although the football team was disbanded, Porteño kept other sports active, such as rugby union, which is currently practised at the club facilities located in San Vicente. The reason why Porteño went off football was that the club wanted to keep as amateur, and rugby union is not a professional sport in Argentina.

Porteño affiliated to Unión de Rugby del Río de la Plata in 1932. The team debuted that season in the third division, finishing 6th. In 1935 Porteño promoted to the second division and in 1939 the team won the first division championship organized by the Federación Católica Argentina de Rugby.

In 1944 the Government of the City of Buenos Aires notified Porteño it had to leave its lands in Palermo, which were finally expropriated in 1945.

In 1951 Porteño won the long-awaited promotion to Primera División, but the team remained there just one season so the following year was relegated after losing its match at the hands of Estudiantes de Paraná.

After playing in different fields, the club finally could acquire a land located in Magallanes and Pardo streets of San Vicente in 1971. Porteño still has its facilities there. The same year the club formed its first women's field hockey team, which has been developing as years went by.

Football

• Primera División (2): 1912 FAF, 1914 FAF
• Copa de Competencia Jockey Club (2): 1915, 1918
• Copa Bullrich (1): 1906 ^{[note 1]}