Abstract: Social Impact Assessment (SIA) is a methodology used to review the social effects of infrastructure projects and other development interventions. The development of Kalasin Rajabhat University influenced the environmental impact and social impact with community around the university. This research aimed to study the effect of social impact of the establishment Kalasin Rajabhat University of Song Plueai sub-district, Na Mon district, Kalasin province. This research also surveyed the opinions of population in Song Plueai subdistrict, Na Mon district, Kalasin province about social impact in the community. The samples of this study were 333 household agents with stratified random sampling techniques. The questionnaires were developed and used to collect data and were used to assess the reliability. The data were analyzed by using percentage, mean, standard deviation and multiple regression testing. The results revealed that: the value of human resource showed that social impact was at the (+) very low level. The value of quality of life showed that social impact was at the (+) low level. Factors that effects the social impact of establishment of Kalasin Rajabhat University included that occupation. This information can be used in to build a regression equation of the form: SIA = 0.969-0.045 (occupation).