The aim of this investigation was to determine the forage and seed yield, relationships among its characters in some grass pea genotypes. This study was conducted between 2017-2020 at Field Crops Department, Agriculture Faculty, Tekirdağ Namık Kemal University, Turkey in randomized block design with three replications. The characters which were determined in the study varied between; plant height 85.75-103.60 cm, number of branches per plant 5.40-6.42 pcs, number of pods per plant 19.12-27.66 pcs, pod width 9.57-11.60 mm, pod length 31.65-36.70 mm, number of seeds per pod 2.86-3.44 pcs, seed weight per pod 1.74-2.26 g, 1000-seed weight 218.88-260.26 g, seed yield 160.22-270.83 kg da-1, herbage yield 1462.22-2226.67 kg da-1 and hay yield 564.18-373.74 kg da-1. The highest plant height, number of branches per plant, number of pods per plant and seed yield were determined in genotype ‘Karadağ’; however, the highest number of seeds per pod, herbage and hay yield were found in grass pea population 'Tekirdağ'.