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 the first stage, the 80 clubs were divided in eight series of 10 teams, according to geographic criteria.
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.