Abstrak
In this pandemic COVID-19, students were required to use internet in all of the activities in order to limit the face to face interaction. The research aims to see the correlation between students’ internet activity frequency and their vocabulary size. The quantitative research with correlational method has 108 population that took 30% from population as sample of this research which was 33 students. , Questioners and test are used to collect the data. The result showed sig values is smaller than alpha (0,0000010,05) or r-measured was bigger than r-table (0,730>0,3440). This means that the students’ internet frequency activity correlate with their vocabulary size. Second, there was positive correlation between both variables (+0.730). Third, the magnitude of the correlation was high (between 0.71—0.90). This means the more students use internet the more they are exposed to the English language since the Internet use English in majority. The more frequent internet used, the improved vocabulary will.