The present study was performed to evaluate the heterosis effects for seed cotton yield and its components traits of 60 hybrids were obtained from a line x tester analysis of crosses involving fifteen female parents and four male parents along with a check hybrid HHH 223. The heterosis was observed for seed cotton yield, number of bolls, boll weight, days to first flower, number of monopods and plant height. The results showed that range of economic heterosis varied from -60.38 to 48.32% of seed cotton yield, -44.03 to 31.19% of number of bolls, -9.722 to 25% of boll weight, -18.80 to 2.29% of days to first flower, -42.30 to 53.84% of number of monopods and -24.92 to 28.40 of plant height. The overall study of heterosis revealed that the better performing hybrids, H1316 X H1236, H1442 X H1226 and H1316 X H1098-i for seed cotton yield and its components traits like number of bolls, boll weight, number of monopods. So these crosses could be exploited to improve the yield along with one or more yield contributing traits through heterosis breeding.