Marketing plays an important role in the success of organizations and is a major factor of professional success. In this study, we examined the impact of online marketing on brand value. A standard questionnaire was used to collect data about the study variables. The statistical population of the present study consisted of active hotels in Iran. Random method was used for sampling. Morgan Table was also used to determine the number of statistical samples. Accordingly, 384 persons were selected. Software SPSS was used for analysis and confirmation or rejection of research hypotheses. The results of research hypotheses showed that online marketing has a significant impact on all four dimensions of brand value (brand awareness, brand association, quality perception and brand loyalty).