This research was conducted to assess the socio-cultural impacts of Golabdarreh Park in Region 1 of Tehran Municipality and mainly has aimed to identify stakeholders and obstacles of the project. It also provided solutions to improve the status quo and decrease citizens’ social problems. This research was descriptive from the viewpoint of procedure and applied from the viewpoint of objective, and the data were collected through documentary and field method. In the documentary section, all of the presented documents were reviewed and in the field section, 300 residents were chosen as a sample and the questionnaire was administered on them. At the same time, the municipal managers, the operational officials and the concerned institutions were interviewed by semi-structured interview procedure with purposive and convenience sampling. The findings showed that the construction of the park had both positive and negative impacts, but the positive ones outweighed the negative ones. The most important positive impacts included restraining from illegal constructions and land-grabbing, generating a green belt in Alborz mountain range, changing the families’ behavior patterns, increasing environmental aesthetics, decreasing noises and air pollution, increasing health and social interactions, and creating job opportunities.