This paper examines the writing ability of Korean college students as a basis for discussing the academic ability gap. First, college students were randomly selected to write on the same topic, and their writing level were identified. Next, we analyzed the difference in writing ability among college students by region, establishment, departments, and gender. The result of the analysis revealed that the writing ability of Korean college students was downgraded. They also showed a gap in academic ability by region. However, although there were differences in scores by establishment, division, and gender, they were not significant in terms of LQ index level. It is hoped that “academic ability gap” will become an issue in Korean language education research.