The study investigated the effect of social media on family bond and cohesion: A study of Port Harcourt resident, Rivers State. The study was anchored on technological determinism and rational choice theories and employs survey research design to gather information from social media users in Port Harcourt with the population of 3, 171, 000.It adopts Taro Yamane sample size determination to arrive at 400 as the sample size and employed purposive and multi-stage sampling techniques with the questionnaire as the instrument of data collection. Some of the objectives of the study include to, identify the extent of exposure to social media platforms among Port Harcourt residents; examine the predominantly social media platform used for family bond and cohesion in Port Harcourt and to find out the factors that hinder social media platforms to bond families in Port Harcourt. Some of the objectives of the study include identifying the extent of exposure to social media platforms among Port Harcourt residents, to examine the predominantly social media platforms used for family bond and cohesion in Port Harcourt. The study found that Port Harcourt residents are adequately exposed and interact on social media; this helps families to interact on regular basis for bond and cohesion. Although, lack of electricity experienced in Port Harcourt has hindered Port Harcourt residents from having an effective use of social media. Also, it was found that WhatsApp and Facebook are the major social media platforms used by Port Harcourt residents. The study recommends that families in Port Harcourt who are exposed to social media for family bond and cohesion should be mindful of what they expose themselves to and share on social media since many of such information give exposure to the wrong people and create security risk or danger ; Port Harcourt social media users should be exposed to other social media platforms like Twitter, Instagram, etc. for family bond and cohesion; the government should intensify efforts on constant power supply to Port Harcourt residents to enable them connect with families members, relatives and friends.