According to the interregional migration in 2020, Gyeonggi-do, Sejong, Gangwon-do, Chungcheongbuk-do, Jeju Special Self-Governing Province, and Chungcheongnam-do have net inflows, and the remaining regions have net outflows. The migration in the Seoul Metropolitan Area occurs mostly within the Seoul Metropolitan Area. Regarding the interregional migration of the Seoul Metropolitan Area, the immigrants from the Honam and Yeongnam regions are not as high as in the past, and out-migrants to Chungcheongbuk-do, Chungcheongnam-do, and Gangwon-do are relatively high. The interregional migrations of Gangwon-do to and from the Seoul Metropolitan Area are large, and the interregional migrations to and from the neighboring Chungcheongbuk-do are also large. In the case of the Chungcheong region, most interregional migration occurs to and from the Seoul Metropolitan Area and within the Chungcheong region. Interregional migration of the Honam region to and from Gangwon, Chungcheongbuk-do, and the Yeongnam region are very low. Interregional migrations of the Yeongnam region to and from the Seoul Metropolitan Area and neighboring regions are high. Jeju Special Self-Governing Province has high migration rates to and from the Seoul Metropolitan Area and Gyeongsangnam-do.

The out-migration regions are outside of the Seoul Metropolitan Area. For example, in Gangwon-do, Chungcheongbuk-do, Chungcheongnam-do, Jeollabuk-do, and Jeju Special Self-Governing Province, more than 50% of the out-migrants outflow to the Seoul Metropolitan Area. However, in the case of the remaining regions outside the Seoul Metropolitan Area, the migration rates to the Seoul Metropolitan Area are 20 to 30%, but the migration rates to the Seoul Metropolitan Area are decreasing.