Birthplace Rankings for the 26 Million Residents of the Seoul Metropolitan Area

‌Let's calculate this using Statistics Korea's actual 'Place of Residence × Place of Birth' matrix.
This is not an estimate of 'ancestral/family hometowns' that includes the hometowns of parents and grandparents. According to the 2020 Population and Housing Census, the population of the Seoul Metropolitan Area was 26.04 million, consisting of 9.586 million in Seoul, 2.945 million in Incheon, and 13.512 million in Gyeonggi.
Birthplace Rankings for the 26 Million Residents of the Seoul Metropolitan Area
Birthplace | Metropolitan Population | Estimated Proportion
Gyeonggi | approx. 6.39 million | 24.6%
Seoul | approx. 7.66 million | 29.5%
Incheon | approx. 1.74 million | 6.7%
Jeonnam | approx. 1.69 million | 6.5%
Chungnam | approx. 1.36 million | 5.2%
Jeonbuk | approx. 1.31 million | 5.0%
Gyeongbuk | approx. 1.11 million | 4.3%
Gangwon | approx. 0.94 million | 3.6%
Chungbuk | approx. 0.75 million | 2.9%
Gyeongnam | approx. 0.72 million | 2.8%
Busan | approx. 0.61 million | 2.3%
Daegu | approx. 0.39 million | 1.5%
Gwangju | approx. 0.32 million | 1.2%
Daejeon | approx. 0.24 million | 0.9%
Ulsan | approx. 0.12 million | 0.5%
Jeju | approx. 0.10 million | 0.4%
Sejong | approx. 0.03 million | 0.1%
North Korea/Foreign Countries, etc. | approx. 0.59 million | 2.3%
Total | approx. 26.00 million | 100%
※ Since each figure is rounded from the original data proportions, there may be slight discrepancies in the total. In the original data, Seoul residents were born in Seoul (48.3%), Gyeonggi (8.0%), and Jeonnam (7.3%); Gyeonggi residents were born in Gyeonggi (39.6%), Seoul (19.6%), and Jeonnam (6.0%); and Incheon residents were born in Incheon (42.8%), Seoul (12.2%), and Gyeonggi (9.4%). (National Data Research Institute)
Crucially, the number of people born within the Seoul Metropolitan Area is approximately 10.4 million.
Born in Seoul: 7.66 million, Born in Gyeonggi: 6.39 million, Born in Incheon: 1.74 million, Total: approx. 15.79 million
In other words, out of the current 26 million residents in the Seoul Metropolitan Area, approximately 15.8 million (about 61%) are estimated to have been born in the metropolitan area. Conversely, those born outside the metropolitan area account for approximately 9.6 million (about 37%).