Abstract: Background: The present study was conducted to determine the effects of humic acid treatments on yield, morphological characteristics and essential oil components of coriander. Materials and Methods: The present study was carried out over the experimental fields of Erciyes University Agricultural Research and Implementation Center during the summer growing season of 2014. Experiments were conducted in randomized blocks split plots experimental design with 4 replications over 40 plots with two different coriander cultivars and different humic acid doses and yield, morphological characteristic analyzed with MSTAT-C statistic program that have been ANOVA (Analysis of variance). Results: Current findings revealed that different humic acid doses had different impacts in coriander cultivars. In general, 400 g day–1 was considered as the most effective dose had better impacts on yield and other parameters coriander cultivars compared to control treatment. Conclusion: Significant changes (p<0.05) were not observed in yield and other parameters over this dose and even negative impacts were observed on plant growth and development in some cases at doses. After this results, humic acid treatments has a great effect on yield, morphological characteristics and essential oil components of coriander.