| Season: | 2013–14 |
| Nextseason: | 2014–15 |
The 2013–14 Campeonato Nacional de Seniores was the first season of the newly created third-tier football league in Portugal after the merging of the Segunda Divisão and Terceira Divisão. It began on 25 August 2013 and finished on 10 June 2014.
This first edition consisted of 19 clubs from the District Championships, 39 from the Segunda Divisão, 19 from the Terceira Divisão and the three teams relegated from the Segunda Liga during the 2012–13 season, making 80 clubs.
S.C. Freamunde won the overall competition, defeating Clube Oriental de Lisboa 3–2 in the final.
The league was divided in eight series of 10 clubs placed geographically, with the exception of teams from Madeira Islands (divided through the first series) and from the Azores Islands (divided through the last series).[1] [2]
After a First Stage in a home-and-away system, the first two best placed teams of each league played in two groups of 8 teams in a Second Stage with each league winner earning a promotion to the Segunda Liga, plus a two-round play-off winner between the two second placed teams. The two group winners then played a Grand Final on neutral ground for the overall Campeonato Nacional title.
The remaining 8 clubs from each league from the First Stage played in 8 different groups with the last two placed teams being relegated to the District Championships. The 6th placed teams from those leagues then played a two-round play-off with between themselves to decide the remaining four clubs to be relegated.[3]
Qualified teams:[4]
Relegated from Segunda Liga:
From the Second Division (3rd level until 2012–13):
Promoted from the Third Division (4th level until 2012–13):
Promoted from the District Championships (5th level until 2012–13):
Vitória de Guimarães B is promoted to 2014–15 Segunda Liga.