1989-90 Regionalliga season

The 1989-90 Regionalliga season was the 16th season of the Regionalliga as the fourth-level of ice hockey in Germany. Deggendorfer EC won the championship.

Regionalliga South

 * EV Pegnitz waived its participation.

Qualification
EHC Joggers Essen withdrew after seven losses (21:138 goals) and was disqualified.

Group B
ESV Trier - EHC Neuwied 4:7; 7:6
 * 1st place

EC Bad Nauheim Ib renounced participation in the placement game, Zweibrücken took their spot.
 * 3rd place

VERC Lauterbach - EHC Zweibrücken 13:7

Qualifikation
EC Diez-Limburg - BSC Preussen 1b 6:3; 3:2

Semifinals
Deggendorfer EC - ESC Wernau - 7:3; 4:5

EC Diez-Limburg - GSC Moers 7:12; 10:3

Final
Deggendorfer EC - GSC Moers 9:6; 7:6