This research is on Influence of social media in the performance of secondary school students in English language in Nsukka education zone of Enugu state. The purpose of this research was to investigate the influence of social media on the performance of secondary school students in English language in Nsukka Education Zone of Enugu State. Responses were elicited from students and teachers in ten secondary schools in the three local governments (Nsukka, Uzo-uwani and Igbo-Etiti) that made up the Nsukka Education zone. The study sample was fifty nine (59) secondary schools, in which twenty three thousand, two hundred and fifty nine (23,259) were students and one thousand, seven hundred and ninety two (1,792) were teachers. A four-point Likert type rating questionnaire titled ‘Social Media and Academic Performance Of Students In English Language’ (SMAPOSIEL) was used to collect data from the respondents. The descriptive survey design was used. Simple random sampling was employed in sampling the respondents. Frequency and mean (X) were used in the analysis of data. To achieve the objectives of the research, the study used a mixed method approach which involved the survey of student’s addictiveness and the teacher’s response on its effect on students. The study revealed that a great number of students in Nsukka education Zone are addicted to social media such as WhatsApp, Face book, twitter etc for making friends and chatting instead of academic work. In addition, the negative effects of this trend are seen in their wrong use of language, grammar and spelling such as the use of short phrases and incomplete sentences, sentence structure, content organization, incessant use of acronyms, misuse of phonetic spelling, and less study time due to the heavy participation on social media networks. Nevertheless, there were cases where others experience improvement in their academic performance as a result of participation on social media networks. The findings of the study led to the conclusion that the dominance and addiction on social media are the major causes of poor performance in English language both in internal and external examinations among secondary school students of Nsukka Education Zone of Enugu State. To this end, the researcher recommended that social media should be used for academic purposes, social networking sites should be expanded and new pages should be created to enhance students academic activities, more strict and proper supervision by all stakeholders should be imbibed, workshops, seminars and public enlightenment programmes should be launched by the government, parents and teachers should check the sites their students / wards are always using so as to be guided properly. This is to create a balance between social media and academic activities of students to avoid setbacks in the academic performance of the students.