Seoul, South Korea
Capital city · Population 10.3M
Seoul is the capital and the largest city in South Korea with a population of approximately 10,349,312 people as of 2026. This makes it the 20th largest city in the world, accounting for 20.23% of South Korea's total population of 51.2M. Seoul is classified as a megacity and operates in the Asia/Seoul timezone. The average annual temperature is 12.9°C with 1,443 mm of rainfall per year. The city sits at an elevation of 27 meters above sea level.
Population
10,349,312
Global Rank
#20
Country Rank
#1
% of South Korea
20.23%
Avg Temperature
12.9°C
Annual Rainfall
1,443 mm
Elevation
27 m
Timezone
Asia/Seoul
Seoul on the Map
Climate in Seoul
Seoul's warmest month is Aug and the coldest is Jan. The wettest month is Jul with 522 mm of rainfall.
Average Monthly Temperature
Monthly Rainfall
South Korea at a Glance
Country Population
51,159,889
Capital
Seoul
Region
Eastern Asia
Major Cities
58
GDP per Capita
$36,239
Life Expectancy
83.4 years
Urban Population
81.2%
Growth Rate
-0.00%
Other Major Cities in South Korea
Nearest Major Cities
Closest cities to Seoul with over 100,000 people
| City | Population | Distance |
|---|---|---|
| Gwangmyeong | 357,545 | 14 km |
| Siheungdong | 128,142 | 14 km |
| Guri-si | 195,236 | 15 km |
| Goyang-si | 1,061,752 | 16 km |
| Bucheon-si | 850,731 | 19 km |
| Anyang-si | 595,644 | 20 km |
| Seongnam-si | 914,832 | 20 km |
| Hanam | 254,415 | 20 km |
Frequently Asked Questions
What is the population of Seoul?
The population of Seoul, South Korea is approximately 10,349,312 people, making it the 20th largest city in the world and the 1st largest in South Korea.
Is Seoul the capital of South Korea?
Yes, Seoul is the capital of South Korea.
What is the climate like in Seoul?
Seoul has an average annual temperature of 12.9°C and receives 1,443 mm of rainfall per year. The warmest month is Aug and the coldest is Jan.
What timezone is Seoul in?
Seoul is in the Asia/Seoul timezone.