1978 2. deild karla
The 1978 season of 2. deild karla was the 13th season of third-tier football in Iceland.
Group A
| Pos | Team | Played | Points | Notes |
| 1 | Selfoss | 10 | 18 | Advanced to final round |
| 2 | Víðir | 10 | 16 | - |
| 3 | Grindavík | 10 | 12 | - |
| 4 | Hekla | 10 | 7 | - |
| 5 | Þór Þ. | 10 | 5 | - |
| 6 | USVS | 10 | 4 | - |
Group B
| Pos | Team | Played | Points | Notes |
| 1 | Njarðvík | 10 | 18 | Advanced to final round |
| 2 | Léttir | 10 | 11 | - |
| 3 | Bolungarvík | 10 | 9 | - |
| 4 | ÍK | 10 | 9 | - |
| 5 | Stefnir | 10 | 7 | - |
| 6 | Stjarnan | 10 | 6 | - |
Group C
| Pos | Team | Played | Points | Notes |
| 1 | Víkingur Ó. | 10 | 18 | Advanced to final round |
| 2 | Afturelding | 10 | 15 | - |
| 3 | Leiknir R. | 10 | 11 | - |
| 4 | Snæfell | 10 | 8 | - |
| 5 | Skallagrímur | 10 | 4 | - |
| 6 | Óðinn | 10 | 4 | - |
Group D
| Pos | Team | Played | Points | Notes |
| 1 | KS | 8 | 16 | Advanced to final round |
| 2 | Tindastóll | 8 | 9 | - |
| 3 | Leiftur | 8 | 7 | - |
| 4 | Dalvík | 8 | 6 | - |
| 5 | Höfðstrendingur | 8 | 2 | - |
Group E
| Pos | Team | Played | Points | Notes |
| 1 | Magni | 8 | 12 | Advanced to final round |
| 2 | Árroðinn | 8 | 11 | - |
| 3 | HSÞ-b | 8 | 10 | - |
| 4 | Dagsbrún | 8 | 6 | - |
| 5 | Reynir Á. | 8 | 1 | - |
Group F
| Pos | Team | Played | Points | Notes |
| 1 | Einherji | 10 | 17 | Advanced to final round |
| 2 | Sindri | 10 | 15 | - |
| 3 | Leiknir F. | 10 | 11 | - |
| 4 | Huginn | 10 | 9 | - |
| 5 | Hrafnkell Freysgoði | 10 | 6 | - |
| 6 | Höttur | 10 | 2 | - |