U Urban communities have a variety of activities and routines with highmobility. It takes a balance between busy activities and casual activities wherepeople have the freedom to communicate and interact in the space. The area ofpublic green open space in Kecamatan Serpong has reached 28% of total requiredby UU No. 26 article 29. Most of the green open space is located in certain housingareas, so the utilization is more focused for the residents of the housing concerned.Based on this fact, the purpose of this research to discussed the extent to which thesocial functions that must be played by public green open space outside the housingarea can fulfill the needs of people living outside the existing housing areas. Thestudy of the social functions of public green open space will be carried out inKecamatan Serpong, Kota Tangerang Selatan, with Hutan Kota 2, TamanKesehatan, and Taman Perdamaian as samples. This research used a quantitativedescriptive method by using data collection instruments in the form of observationsand questionnaires which were given a score based on Likert Scale. Usingproportion (percentage) or frequency as data analysis technique. From the resultsof the study it is found that the social functions of public green open space in HutanKota 2, Taman Kesehatan, dan Taman Perdamaian has been achieved, namely asa communication medium for city residents, describing local cultural expressions,recreation areas, and educational and research facilities.