Fundado en 1896 como Club Atlético Capital a los pocos meses fue renombrado Porteño Athletic Club.
Más adelante castellanizó su nombre a Club Atlético Porteño.
Año | Liga | Nivel | Pts | PJ | G | E | P | GF | GC | Dif | Pos | Obs. |
| | | | | | | | | | | | |
1899 | AAFL | 2 | 17 | 16 | 7 | 3 | 6 | 13 | 31 | -18 | 6/9 | |
1900 | AAFL | 2 | 3 | 8 | 1 | 1 | 6 |
|
|
| 5/5 | |
1901 | AAFL | 2 | 2 | 16 | - | 2 | 14 | 3 | 37 | -34 | 9/9 | |
1902 | AAFL | 2 | | 12 | | | | | | | #/15 | |
1903 | AFA | 2 | 5 | 8 | 2 | 1 | 5 | 2 | 18 | -16 | 8/10 | |
1904 | AFA | 2 | 6 | 8 | 3 | 0 | 5 | 10 | 20 | -10 | 8/10 | |
1906 | AFA | 2 | 15 | 11 | 7 | 1 | 3 | 27 | 16 | 11 | 3/19 | 🔺 |
1908 | AFA | 1 | 13 | 18 | 6 | 1 | 11 | 23 | 41 | -18 | 7/10 | |
1909 | AFA | 1 | 16 | 18 | 7 | 2 | 9 | 35 | 39 | -4 | 7/10 | |
1911 | AFA | 1 | 23 | 17 | 10 | 3 | 4 | 27 | 14 | 13 | 2/9 | ❌ |
1912 | FAF | 1 | 21 | 15 | 8 | 5 | 2 | 25 | 11 | 14 | 1/8 | 1er. título (nivel 1). |
1913 | FAF | 1 | 12 | 18 | 4 | 4 | 10 | 26 | 32 | -6 | 8/10 | |
1914 | FAF | 1 | 24 | 14 | 10 | 4 | 0 | 46 | 18 | 28 | 1/8 | 2do. título (nivel 1). ❌ |
1915 | AAF | 1 | 36 | 24 | 17 | 2 | 5 | 57 | 26 | 31 | 4/25 | |
1917 | AAF | 1 | 18 | 20 | 7 | 4 | 9 | 20 | 30 | -10 | 13/21 | |
1918 | AAF | 1 | 18 | 19 | 7 | 4 | 8 | 21 | 29 | -8 | 11/20 | |
1919 X | AAF | 1 | 10 | 6 | 5 | 0 | 1 | 13 | 6 | 7 | Canc. |
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