The 2017 LNFA season was the 23rd season of American football in Spain.
Teams were divided into three categories, named Serie A, B and C, with promotion and relegation between them.
Badalona Dracs won their eighth title, a record for the tournament.
If two or more teams are tied at the end of the competition, the ranking of teams in each group is based on the following criteria:
Six teams entered the LNFA Serie A, the top-tier level of American football in Spain. Murcia Cobras promoted from the last Serie B while no team was relegated from the previous season.
As an expansion of the league to eight teams was planned, the last qualified team played also the relegation play-offs instead of being directly relegated.
Eight teams will play the Serie B in 2017. No teams were relegated from Serie A, while Las Rozas Black Demons, Rivas Osos and ANV Fuenlabrada Cuervos promoted from the previous season of the Serie C.
Granada Lions resigned to continue playing in the Serie B.
As the Serie A would be expanded to eight teams for the next season, the two winners of the semifinals both were directly promoted while the two losers would play a serie against the fifth and the sixth qualified teams of the Serie A.
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