The purpose of this study is to examine the characteristics of vocabulary used by college students by analyzing their writing using quantitative methods. The subject of analysis is 194 essays written by 101 college students. As a result of the analysis, there were 10,135 individual vocabularies and 80,732 total vocabularies. The top 100 high-frequency words among college students' vocabulary were largely the same as the results of the three surveys compared. As a result of classifying college student vocabulary according to three meaning groups, ‘first person’ vocabulary was used the most when it came to ‘person’-related vocabulary. ‘Indicative words and connecting words’ were used at 2.7% and 0.6%, respectively, and were considered to have contributed to increasing the cohesion of the writing. Vocabulary related to ‘leisure life’ was used at a rate of 2.4% of the total vocabulary, and it was confirmed that vocabulary reflecting the growth background of current generation students appeared with high frequency. The research results of this paper will help instructors understand their students. A limitation of this paper is that its analysis results do not apply to all college students. However, this limitation is seen as an inevitable limitation of vocabulary measurement research.