| Competition: | 1. divisjon |
| Season: | 1983 |
| Winners: | Vålerengen 3rd title |
| Relegated: | Brann Mjøndalen HamKam |
| Continentalcup1 Qualifiers: | Vålerengen |
| Continentalcup1: | European Cup |
| Continentalcup2 Qualifiers: | Moss |
| Continentalcup2: | Cup Winners' Cup |
| Continentalcup3 Qualifiers: | Lillestrøm |
| Continentalcup3: | UEFA Cup |
| League Topscorer: | Olav Nysæter (14 goals) |
| Matches: | 132 |
| Total Goals: | 400 |
| Biggest Home Win: | Brann 9–2 Viking (9 October 1983) |
| Biggest Away Win: | HamKam 0–5 Eik (31 July 1983) |
| Highest Scoring: | Brann 9–2 Viking[1] (9 October 1983) |
| Longest Wins: | Vålerengen (5 games) |
| Longest Unbeaten: | Vålerengen (12 games) |
| Longest Winless: | Bryne Rosenborg (10 games) |
| Longest Losses: | HamKam (5 games) |
| Highest Attendance: | 17,500 (16 May 1983) |
| Lowest Attendance: | 802 (25 September 1983) |
| Average Attendance: | 5,526 20.9% |
| Dates: | 24 April – 9 October |
| Prevseason: | 1982 |
| Nextseason: | 1984 |
The 1983 1. divisjon was the 39th completed season of top division football in Norway.
22 games were played with 2 points given for wins and 1 for draws. Number eleven and twelve were relegated. The winners of the two groups of the 2. divisjon were promoted, as well as the winner of a series of play-off matches between number ten in the 1. divisjon and the two second-placed teams in the two groups of the 2. divisjon.
Vålerengen won the championship, their third title.
Note: Table lists in alphabetical order.
The qualification play-off matches were contested between Brann (10th in the 1. divisjon), Pors (2nd in the 2. divisjon - Group A), and Strindheim (2nd in the 2. divisjon - Group B). Strindheim won and were promoted to the 1. divisjon.
| Rank | Player | Club | Goals |
|---|---|---|---|
| 1 |  Olav Nysæter | Kongsvinger | 14 |
| 2 | André Krogsæter | Lillestrøm | 13 |
| 3 | Steinar Aase | Start | 12 |
| 4 | Anders Giske | Brann | 11 |
| Svein Mathisen | Start | ||
| 6 | Pål Jacobsen | Vålerengen | 10 |
| 7 | Stein Kollshaugen | Moss | 9 |
| Erik Nystuen | Kongsvinger | ||
| Geir Henæs | Moss | ||
| 10 | Sven Holm | Eik | 8 |
| Tom Antonsen | Eik | ||
| Håvard Moen | Rosenborg | ||
| Geir Johansen | Eik |