The 2015, was the 2ú Torneo Federal A season since it became part of the third tier of the Argentine football league system. The tournament is reserved for teams indirectly affiliated to the Asociación del Fútbol Argentino (AFA), while teams affiliated to AFA have to play the Primera B Metropolitana, which is the other third tier competition. The champion will be promoted to Primera B Nacional. 40 teams competed. The regular season began on March 20 and ended on December 10.
The teams were divided into four zones with ten teams (a total of 40 teams) in each zone and it was played in a round-robin tournament. The teams placed 1ú to 3ú and the two best 4ú team from the four zones qualified for the Second Stage.
Consisted of fourteen (14) teams that qualified from the First Stage and the winner was declared champion and automatically promoted to the Primera B Nacional. It was played in a round-robin system. The teams placed 2ú to 4ú advanced directly to the Fifth Stage, while the teams placed 5ú to 14ú advanced to the Third Stage.
The twenty six (26) teams that did not qualify for the Tetradecagonal Final were grouped into two zones of thirteen (13) teams. The teams placed 1ú to 5ú of both zones advanced to the Third Stage.
The teams placed 5ú to 14ú from the Tetradecagonal Final and the teams placed 1ú to 5ú of both zones of the Revalida Stage (20 teams) played against each other in a Double-elimination tournament. The 10 winning teams advanced to the Fourth Stage.
The 10 winning teams coming from the Third Stage played against each other in a Double-elimination tournament. The 5 winning teams advanced to the Fifth Stage.
The teams placed 2ú to 4ú in the Tetradecagonal Final and the 5 winning teams coming from the Fourth Stage played against each other in a Double-elimination tournament. The 4 winning teams advanced to the Fifth Stage.
The 4 winning teams coming from the Fifth Stage played against each other in a Double-elimination tournament. The 2 winning teams advanced to the Seventh Stage.
The 2 winning teams coming from the Fifth Stage played against each other in a Double-elimination tournament. The winning team was promoted to the Primera B Nacional.
After the Revalida Stage a table was drawn up with the addition of points of the First Stage and Revalida Stage, the last four of both zones were relegated to Torneo Federal B.
<sup>1</sup> Play their home games at Estadio José MarÃÂa Minella.
<sup>1</sup> Play their home games at Estadio Antonio Romero.
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