The 2015–16 Campeonato de Portugal (also known as Campeonato de Portugal Prio, for sponsorship reasons) was the third season of Portuguese football's renovated third-tier league, since the merging of the Segunda Divisão and Terceira Divisão in 2013, and the first season under the current Campeonato de Portugal title.
A total of 80 teams competed in this division, which began on 23 August 2015 and ended on 10 June 2016.
In each series, teams played against each other in a home-and-away double round-robin system.
To determine the overall division champion, the group winners contested a one-off grand final on neutral ground.
The remaining eight clubs from each first-stage series were divided in eight groups of eight teams, with home-and-away matches.