1980–81 Nationalliga A season
The 1980/81 season was the 43rd regular hosting of the National League A, the top Swiss league in hockey. For a total of second time in their history, the EHC Biel was Swiss champion, during the Lausanne HC descent into NLB.
Mode
In a joint main round played each of the eight teams in four games against each group opponent, bringing the total number of matches per team was 28. The top six teams qualified for the final round, in which the master has been played, the points were taken from the main round. The two last placed athlete had to compete for the league in the relegation with the four best teams in the NLB. For a win, each team was given two points, a draw one point. At a loss to give any points.