Understanding the Seoul South Korea postal code system is essential for anyone sending mail, filling out forms, registering for universities, or shipping packages to South Korea. Whether you are a student planning to study in South Korea, a business professional, or a traveler booking accommodation, knowing how the Korean postal code system works saves time and prevents delivery errors.
This comprehensive guide covers every aspect of the Seoul postal code system, including district-wise codes, how to read a Korean address, and how to use the system when corresponding with Korean institutions.
What Is a South Korea Postal Code
South Korea uses a 5-digit postal code system, officially called the “New Postal Code” system, which was introduced in August 2015. Before this reform, South Korea used a 6-digit code. The current 5-digit system is managed by Korea Post and covers every region, city, district, and rural area across the country.
The postal code in South Korea is called “우편번호” (Upyeon Beonho) in Korean, which directly translates to “mail number.” When filling out any Korean form, whether it is a university application, a visa form, or a courier slip, you will typically see a field labeled 우편번호.
Seoul, being the capital and the most populated city in South Korea with over 9.7 million residents, has hundreds of distinct postal codes divided by district (called “gu” in Korean) and neighborhood (called “dong”).
How the Seoul Postal Code System Works
Seoul is divided into 25 administrative districts called “gu” (구). Each gu is further divided into smaller neighborhoods called “dong” (동). Every dong has at least one unique 5-digit postal code, and larger dongs may have several codes depending on the density and number of buildings.
The structure of Seoul postal codes generally follows a pattern where codes in the 01000 to 08999 range cover most of Seoul. However, this is not a strict rule, and postal codes do not always follow a simple geographic sequence.
When addressing mail or packages to Seoul, the postal code always appears at the beginning or end of the address block, depending on whether you are writing in Korean format or international format.
Seoul South Korea Postal Code by District
Below is a detailed breakdown of postal codes for all 25 districts in Seoul:
Dobong-gu (도봉구) Postal Code Range: 01300 to 01399 Dobong-gu is located in the northern part of Seoul and includes neighborhoods such as Dobong-dong, Ssangmun-dong, and Chang-dong.
Dongdaemun-gu (동대문구) Postal Code Range: 02460 to 02599 Home to the famous Dongdaemun Design Plaza, this district is a center for fashion, wholesale markets, and nightlife.
Dongjak-gu (동작구) Postal Code Range: 06900 to 07099 Dongjak-gu is located in the southern part of Seoul, housing Seoul National Cemetery and several major universities.
Eunpyeong-gu (은평구) Postal Code Range: 03300 to 03499 This northwestern district borders Gyeonggi Province and is known for the Bukhansan National Park area.
Gangbuk-gu (강북구) Postal Code Range: 01100 to 01299 Gangbuk means “north of the Han River” and this area is known for its residential neighborhoods and Bukhansan hiking trails.
Gangdong-gu (강동구) Postal Code Range: 05100 to 05399 Located in the eastern part of Seoul, Gangdong-gu is a rapidly developing area with major apartment complexes.
Gangnam-gu (강남구) Postal Code Range: 06000 to 06299 Gangnam is internationally recognized as one of the wealthiest and most prestigious districts in all of Asia. Students pursuing Korean language courses often search for housing in surrounding areas due to its excellent transport connectivity.
Gangseo-gu (강서구) Postal Code Range: 07500 to 07799 Gangseo-gu is home to Gimpo International Airport and several large industrial and residential zones.
Geumcheon-gu (금천구) Postal Code Range: 08500 to 08699 This district in the southwestern part of Seoul is known for its manufacturing and small business clusters.
Guro-gu (구로구) Postal Code Range: 08200 to 08399 Guro Digital Complex, formerly an industrial zone now converted into a major IT and startup hub, is the centerpiece of this district.
Gwanak-gu (관악구) Postal Code Range: 08700 to 08999 Gwanak-gu is where Seoul National University (SNU), one of Korea’s most prestigious institutions, is located. Many international students familiar with Korean student life live in this district.
Gwangjin-gu (광진구) Postal Code Range: 04900 to 05099 Known for Konkuk University and Children’s Grand Park, this eastern district is a popular area for students and young professionals.
Jongno-gu (종로구) Postal Code Range: 03000 to 03199 Jongno is one of the oldest and most historically significant districts in Seoul. Gyeongbokgung Palace, Bukchon Hanok Village, and Insadong are all located here.
Jung-gu (중구) Postal Code Range: 04500 to 04699 Seoul City Hall, Myeongdong shopping district, and Namdaemun Market are located in Jung-gu, making it one of the most visited areas by tourists and foreign residents.
Jungnang-gu (중랑구) Postal Code Range: 02000 to 02199 Located in the northeastern part of Seoul, Jungnang-gu is primarily residential with good metro connectivity.
Mapo-gu (마포구) Postal Code Range: 03900 to 04199 Mapo-gu includes Hongdae, one of the most energetic neighborhoods in Seoul, famous for its nightlife, street performances, independent cafes, and youth culture.
Nowon-gu (노원구) Postal Code Range: 01600 to 01899 Nowon is the most densely populated district in Seoul and home to several universities including Seoul Women’s University and Kwangwoon University.
Seocho-gu (서초구) Postal Code Range: 06500 to 06799 Adjacent to Gangnam, Seocho is home to the Supreme Court of Korea, Samsung headquarters, and the famous COEX Mall and Aquarium.
Seodaemun-gu (서대문구) Postal Code Range: 03600 to 03799 Yonsei University and Ewha Womans University are located in this district, making it a prominent area for students exploring academic programs in Korea.
Seongbuk-gu (성북구) Postal Code Range: 02700 to 02899 Seongbuk-gu is home to Korea University and several cultural and historical sites including Sungkyunkwan University.
Seongdong-gu (성동구) Postal Code Range: 04700 to 04899 Known for the upscale Seongsu-dong area, often called the “Brooklyn of Seoul,” this district has rapidly gentrified over the past decade.
Songpa-gu (송파구) Postal Code Range: 05500 to 05799 Songpa is home to Lotte World, Olympic Park, and the affluent Jamsil neighborhood. Postal codes here fall mostly in the 05500 to 05799 range.
Yangcheon-gu (양천구) Postal Code Range: 07900 to 08099 Yangcheon is a residential district in western Seoul with excellent schools and family-friendly neighborhoods.
Yeongdeungpo-gu (영등포구) Postal Code Range: 07200 to 07399 This district houses Yeouido, Seoul’s financial center and the location of the National Assembly of Korea.
Yongsan-gu (용산구) Postal Code Range: 04000 to 04399 Yongsan is home to the U.S. military base, Itaewon (Seoul’s most international neighborhood), and the newly developed Yongsan Park project.
How to Write a Korean Address with Postal Code
Writing a Korean address correctly is important for mail delivery and official forms. The standard Korean address format follows this structure:
Korean Format (used inside Korea):
- Postal Code (5 digits)
- Province or City
- District (gu)
- Street name (ro or gil) with building number
- Building name or apartment complex (if applicable)
- Unit number
International Format (used when writing to Korea from abroad): Start with the recipient’s name, followed by the street address, neighborhood, district, city, and finally South Korea with the 5-digit postal code.
Example: Recipient Name 123 Yonsei-ro, Seodaemun-gu Seoul, 03722 South Korea
How to Find a Seoul Postal Code Online
Korea Post operates an official postal code search tool at epost.go.kr. You can search by entering:
- The road name (도로명)
- The building number
- The district name
Additionally, platforms like Naver Maps and Kakao Maps display postal codes when you search for any address in Seoul. If you are filling out a university or visa application and need the precise code for your accommodation, using Naver Maps Korean address search is the most reliable method.
Students who plan to learn about Korean culture and live in Seoul for an extended period should bookmark Korea Post’s online lookup tool for ongoing reference.
Postal Code for Major Seoul Landmarks and Institutions
Here are the verified postal codes for key institutions and landmarks in Seoul:
Seoul National University: 08826 Yonsei University (Main Campus): 03722 Korea University: 02841 COEX Convention Center: 06164 Gyeongbokgung Palace: 03045 Seoul Station: 04150 Incheon International Airport (technically in Incheon, not Seoul): 22382 Gimpo International Airport: 07505 Lotte World Tower, Songpa-gu: 05551 Myeongdong, Jung-gu: 04536
Common Mistakes When Using Seoul Postal Codes
Using the Old 6-Digit Code Many older resources still list the pre-2015 six-digit postal codes. These are no longer valid. Always verify that you are using the current 5-digit format.
Confusing Seoul and Incheon Codes Incheon is a separate metropolitan city adjacent to Seoul. Incheon postal codes typically begin with 21 or 22, while Seoul codes mostly fall in the 01 to 08 range. Mixing these up is a common error for newcomers.
Using District Names Without Specifying the City Korea has multiple cities with districts that share similar names. Always write “Seoul” explicitly in the address, especially when corresponding with international senders.
Why Knowing Postal Codes Matters for Students in South Korea
For international students, having the correct postal code is critical for several practical reasons. University admission offices require precise Korean addresses on enrollment forms. When receiving documents from back home, parcels addressed with incorrect postal codes face significant delays. Bank account registration in Korea requires a verified residential address including the 5-digit code. Health insurance enrollment forms, visa extension applications at the immigration office, and SIM card registration all require accurate postal code data.
If you are planning to study abroad in South Korea through a consultancy or partner institution, confirm your exact accommodation address and postal code before your arrival so all your initial administrative tasks go smoothly.
Summary Table of Seoul District Postal Codes
| District | Korean Name | Postal Code Range |
|---|---|---|
| Gangnam-gu | 강남구 | 06000 to 06299 |
| Mapo-gu | 마포구 | 03900 to 04199 |
| Jongno-gu | 종로구 | 03000 to 03199 |
| Yongsan-gu | 용산구 | 04000 to 04399 |
| Seodaemun-gu | 서대문구 | 03600 to 03799 |
| Nowon-gu | 노원구 | 01600 to 01899 |
| Songpa-gu | 송파구 | 05500 to 05799 |
| Gwanak-gu | 관악구 | 08700 to 08999 |
| Seocho-gu | 서초구 | 06500 to 06799 |
| Yeongdeungpo-gu | 영등포구 | 07200 to 07399 |
Final Thoughts on Seoul South Korea Postal Code
The Seoul South Korea postal code system is modern, systematic, and easy to use once you understand the basic district breakdown. Whether you are a first-time visitor, an international student, or a professional relocating to Seoul, always confirm the 5-digit code for your specific address using Korea Post’s official website or Naver Maps.
Accurate postal codes ensure your important documents, university correspondence, and packages reach you without delays. For anyone considering relocating to South Korea for education or professional purposes, the team at Study in South Korea can help you navigate address registration, accommodation, and all administrative requirements from the very start of your journey.