Paying attention to the quality indicators of park formation can lead to coherence and social sustainability of cities. The present research is aimed to evaluate the factors affecting the quality of regional parks in Tabriz in order to provide a suitable and practical solution for managers and designers of green spaces. Data collection was done using questionnaire which were completed by 300 park visitors. Different methods were applied for data analysis including descriptive analysis, Pearson correlation and step by step regression. Using factor analysis, eleven sub-components were extracted with an alphfa greater than 0. 7 of main components of the research. The main components include: access and communication, socialization, comfort and perspective, user and activity; and the sub-components include: accessibility, furniture, facilities and services, security, social groups, various social activities, meeting place, environment, quality of management, quality of maintenance, and design quality. The results of the analysis showed that accessibility, socialization, user and activities, comfort and perspective were ranked from the highest quality to the lowest one, respectively. Among the sub-components, environment is the most important factor in the quality of parks, and the importance of social groups, access to the park, security, meeting place, various social activities, furniture, and facilities were ranked in the following order, respectively. The results of Pearson test also showed that there is a direct and significant relationship between independent components (access and communication, socialization, comfort and perspective, user and activity) with the dependent variable (regional park quality). These components are also able to explain and define 54. 6% of the quality of the regional parks (dependent variables).