Abstract: In this study, we present a hybrid Multi-Criteria Decision Making (MCDM) model to solve convention site selection. In the proposed model, interval comparison matrix which has been inspired by Analytical Hierarchy Process (AHP) is employed to compare the criteria against each other. Furthermore, to calculate the interval weights of criteria, we make use of Goal Programming (GP). Moreover, interval data is utilized to evaluate the alternatives with respect to the criteria. In order to rank the alternatives with respect to criteria, technique for order preference by similarity to an ideal solution (TOPSIS) with interval data and weights is used. In the conditions where there exist uncertainties for both the comparison of criteria against each other and alternatives evaluation with respect to influential criteria in the process of decision making, using this model facilitates the decision making process and causes the quality of decision will be enhance.