Grain yield potential in relation to other important agronomic characters of 20 lentils (L. culinaris) germplasm collected from FATA (Federally Administered Tribal Areas) and neglected pockets of NWFP was tested at the Research Farm of NWFP Agricultural University Peshawar during 1999-2000 growing season. Based on the grain yield potential, the germplasm were divided into three groups in descending order. Germplasm LT-05 ranked first by producing maximum yield of 1459 kg ha -1, while germplasm LT-03 with 1070 kg ha-1 ranked second. Minimum yield of 180 kg ha -1 was obtained by LT-04, followed by LT-01 with 209 kg ha -1. The germplasm in group I viz. LT-05 and LT-03 gave 64 and 82 % higher yield than group II and group III, respectively. The average values of grain yield decreased in descending order from 1264 kg ha -1 in group I to 456 kg ha -1 in group II and then further decreased to 231 kg ha -1 in group III. Similarly, the average values of branches per plant 100-seed weight, pods per plant and harvest index decreased in descending order and showed positive relationship with grain yield. The association of days to maturity, plant height, and dry matter yield with grain yield was negative because their average values increased in descending order in group I to group III.