This study examined the relationship between single-person households in the 20s, university students and Urban-Life- Housing in Seoul. Single-person households in the 20s are mainly concentrated in Dong within 2km from the university campuses, and has a strong correlation with university students of 4-years universities. The accommodation rate of the 4-years university dormitories is 12.8%. And the private sector is supplying 3 types of Urban-Life-Housing less than 40m² outside the universities. The 4-years universities were classified into 25 groups, using kernel density analysis of Urban- Life-Housing within 2km and classified into 4 patterns. The results showed the locational features and density distribution.