1999-00 Austrian Nationalliga season

The 1999-2000 Austrian Nationalliga season was contested as the second-level competition in Austria. The EC Graz 99ers won the championship.

Semifinals

 * EC Graz 99ers (1) - EHC Lustenau (2): 3:1 (4:5, 7:2, 5:1, 5:0)
 * EK Zell am See (2) - EV Zeltweg (3): 3:0 (4:1, 7:4, 4:3)

Final

 * EC Graz 99ers (1) - EK Zell am See (2): 3:2 (4:1, 4:7, 5:1, 4:6, 3:2)