The Segunda Federación is the third tier of the Spanish women's football league system, beginning with the 2022–23 season.

With a format of two regionalised groups, it is the female equivalent of the men's Primera Federación and is run by the Royal Spanish Football Federation.

In July 2019, the new second tier was renamed as Segunda División Pro being later re-branded as Reto Iberdrola for sponsorship reasons.

[2] In early 2022, it was confirmed that the league structure would be altered again, after only three seasons: the existing Primera División would be a standalone professional league of 16 teams, the second tier would be a single nationwide 16-team division known as the Primera Federación, the existing Segunda División Pro with two regionalised groups (32 teams) would become the third tier and be named the Segunda Federación, and the existing Primera Nacional division of 96 teams (six regionalised 16-team groups) would become the fourth tier.

These levels would be administered by the RFEF and more closely resemble the men's post-2021 structure, albeit only one professional league and six fourth-tier groups rather than five[3] (the fourth level was re-named the Tercera Federación FUTFEM prior to the 2023–24 season).