| Competition: | 1. divisjon |
| Season: | 1999 |
| Dates: | 17 April – 17 October |
| Winners: | Haugesund |
| Promoted: | Haugesund Bryne Start |
| Relegated: | Lofoten Skjetten Hødd Clausenengen |
| Matches: | 182 |
| Total Goals: | 550 |
| League Topscorer: | Anders Blomquist (17 goals) |
| Prevseason: | 1998 |
| Nextseason: | 2000 |
The 1999 1. divisjon, Norway's second-tier football league, began play on 17 April 1999 and ended on 17 October 1999. The league was contested by 14 teams, and the top two teams won promotion to Tippeligaen, while the third placed played a promotion-playoff against the 12th-placed team in Tippeligaen to win promotion. The bottom four teams were relegated to the 2. divisjon.
Haugesund and Bryne won direct promotion to Tippeligaen, while Start was promoted after having won 3-2 on aggregate against Strømsgodset in the promotion-playoff. Lofoten, Skjetten, Hødd and Clausenengen was relegated to the 2. divisjon.
| Rank | Player | Club | Goals |
|---|---|---|---|
 Anders Blomquist | Haugesund | ||
 Kristian Bye-Andersen | Eik-Tønsberg | ||
| Tommy Nilsen | Lyn | ||
| Trond Nordseth | Start | ||
| Geir Atle Undheim | Bryne | ||
 Bala Garba | Haugesund | ||
| Ole Petter Skonnord | Kjelsås | ||
| Jarle Wee | Haugesund | ||
| Lars Berg | Raufoss | ||
| Fredrik Horn | Lofoten | ||
| Stein Berg Johansen | Lofoten | ||
| Mikael Edvardson | L/F Hønefoss | ||
| Kjell Roar Kaasa | Lyn |
Start (3rd in 1. divisjon) won the play-offs against Strømsgodset (12th in Tippeligaen) 3–2 on aggregate. ----
Start won 3–2 on aggregate and was promoted to Tippeligaen. Strømsgodset was relegated to 1. divisjon.