Abstract: Twenty-two early and medium maturing groups of cowpea were evaluated for fodder yield potential in a split plot arrangement randomized complete block design, with three replications during 2005 cropping season in Mubi, Nigeria. The mean fodder yield for the cowpea genotypes across insecticidal environment were used to study the stability of performance, correlation analysis among stability parameters and mean fodder yield. The results indicated variations among stability parameters used. Using the generalized linear model, significant differences (p<0.05) were recorded for genotypic effects, insecticidal environment and genotype x environment interaction. Eight groups of stability parameters (i) Fwb₁ and PJb₁ (ii) FWvar and PJvar (iii) P1959 and Wricke (iv) Adj R² and R², (v) Shukla and Plaisted, (vi) Shukla and Plaisted (vii), and Wricke (viii) Plaisted and Peterson and Wricke were identified through simple correlation coefficient r = 1.00. Representative of each group was selected and used together with fodder yield in an enlarged rank sum method to identify cowpea genotype with the best fodder yield. IT 98K-1111-1, IT 86D-1010, IT 86D-719, IT 93K-452 and IT 97K-503-1 were identified to be of a high fodder yield and stable performance across insecticidal environment.