This study was carried out in order to reveal the effects of using social media on social presence in foreign language teaching. Facebook was used as a social media tool as part of the English lessons and 8th grade students who attended a private school in Istanbul participated in the study. The students in the experimental group used social media for their foreign language classes and the control group continued their technology supported foreign language education. Technology supported foreign language education was considered to be the education that involved learning management systems and technological tools that support face-to-face education. Mixed research design was used. For the quantitative part, data were collected with the social presence scale and for the qualitative part face-to-face interview with semi-structured interview technique took place. The quantitative data were analyzed by using Kolmogorov-Smirnov test, independent samples t-test and ANCOVA. For the qualitative part content analysis was used where knowledge building model was also considered. Based on the findings, it was concluded that students in the experimental group who had their classes with Facebook had higher social presence in their foreign language lessons.