Malt barley is the most important cereal crop grown in highland parts of Ethiopia and valuable raw material for beer factories. However, the presence of diverse environments and a limited number of stable varieties are the bottleneck factors for low malt barley production and productivity in the country. Thus, the present investigation was conducted to assess the magnitude of genotype by environment interaction and stability for malt barley grain yield, yield-related and quality traits in the growing areas of the Amhara region, Ethiopia. Hence, fourteen released malt barley varieties were evaluated in a randomized complete block design with four replications, during 2019 main cropping season in six locations; Ankober, Dabat, Debark, Debre Birhan, Debre Tabor and Geregera. Stability analysis of grain yield was executed using univariate stability; AMMI and GGE bi-plot models. The combined ANOVA revealed that genotype by environment interaction (GEI) was highly significant for all traits indicated that the developments of both specific and wide adaptable varieties are essential. The first two principal components of the GGE explained 79.07% of the GGE sum of squares. The stability parameters AMMI and GGE bi-plot identified Holker and IBONE174/03 being the most stable variety. Cultivar superiority measure and yield stability index were positively and significantly correlated with mean grain yield indicating these models were best in identifying stable malt barley varieties. The GGE bi-plot identified three different malt barley growing mega environments. Protein content measures revealed IBON174/03 as the least varying variety across environments. Therefore, varieties IBON174/03 was recommended for commercial production in most malt barley growing areas of Amhara region, Ethiopia. Keywords: AMMI, Correlation, GGE, Protein content, wider adaptation