1955–56 Landsdelsserien

The 1955–56 Landsdelsserien was a Norwegian second-tier football league season.

The league was contested by 54 teams, divided into a total of seven groups from four districts; Østland/Søndre, Østland/Nordre, Sørland/Vestre and Møre/Trøndelag. The two group winners in the Østland districts, Sparta and Strømmen promoted directly to the 1956–57 Hovedserien. The other five group winners qualified for promotion play-offs to compete for two spots in the following season's top flight. Årstad and Steinkjer won the play-offs and were promoted.

Promotion play-offs

 * Sørland/Vestland
 * Results A1–A2
 * Ulf 6–3 Start
 * Results A–B
 * Årstad 2–0 Ulf

Årstad won 2–0 over Ulf and were promoted to Hovedserien.


 * Møre/Trøndelag
 * Molde 2–4 Steinkjer
 * Steinkjer 3–2 Molde

Steinkjer won 7–4 on aggregate and were promoted to Hovedserien.