Quick Answer: How to Find Your Korean Postal Code
To find your Korean postal code, use the official Korea Post postal code search tool or the official Korean road-name address website. Search your address in Korean road-name format, check the matching result, and copy the correct 5-digit postal code.
South Korea now uses a 5-digit postal code system. Korea Post explains that the 5-digit district number replaced the older 6-digit postal code system and is assigned based on geographic features such as roads, rivers, and railroads.
Simple Example
Korean Address
서울특별시 강남구 테헤란로 152
Postal Code
06236
Where to Use It
You can use this postal code when entering your address on Coupang, delivery apps, Korean online shopping websites, school forms, hospital forms, or shipping forms.
Why Korean Postal Codes Confuse Foreigners
Korean postal codes can be confusing for foreigners because Korea uses a different address system from many Western countries. In Korea, addresses are usually connected to road-name addresses, building numbers, and detailed unit information such as apartment number, floor, or room number.
Foreigners often get confused because:
Some old documents still show 6-digit postal codes
Korea now uses 5-digit postal codes
Korean websites often expect Korean-language address input
Road-name addresses and old land-lot addresses can look very different
Online shopping apps may not work well with English-only addresses
Coupang, delivery apps, and forms often require an exact postal code
Korea Post’s official postal code page confirms that the current 5-digit system replaced the old 6-digit system. Expat postal service guides also explain that Korea introduced the current 5-digit postcode system in 2015, replacing the previous 6-digit format.
Main Problem for Foreigners
The biggest problem is not just finding a number.
The real problem is knowing whether that number is the current, correct, 5-digit Korean postal code for your actual road-name address.
What Is a Korean Postal Code?
A Korean postal code is a 5-digit number used to identify a delivery area in South Korea.
Korea Post explains that the postal code is based on a State Basic District Number. This number is assigned to each district and is used as the postal code. The 5-digit district number is based on geographic features such as roads, rivers, and railroads.
Old System vs New System
Old Postal Code
Korea previously used a 6-digit postal code system.
Current Postal Code
Korea now uses a 5-digit postal code system.
Important Rule
If someone gives you a 6-digit postal code, do not use it automatically. Search again using Korea Post or the official road-name address website.
Why Postal Codes Matter for Coupang and Delivery Apps
A Korean postal code is important because it helps Korean delivery and online shopping systems identify the correct delivery area.
For example, if you are using Coupang, the postal code is part of the address information used to match your location with the correct delivery area. Coupang’s developer documentation also describes South Korean postal codes as 5-digit numbers and explains that postal code ranges are connected to city and district-level areas.
Delivery app guides for foreigners also emphasize the importance of entering the address correctly when using Korean delivery apps. HaniSeoul’s guide for foreigners explains that delivery apps in Korea require accurate address setup and address-related details for successful delivery.
Where You May Need a Korean Postal Code
You may need your Korean postal code for:
Coupang
Coupang Eats
Baedal Minjok
Naver Shopping
Market Kurly
Korean hospital forms
school or university forms
bank forms
mobile phone registration forms
international shipping forms
housing or rental documents
Step-by-Step: How to Find Your Korean Postal Code
Step 1. Use Korea Post Postal Code Search
The safest place to start is the official Korea Post postal code search tool.
Korea Post provides a postal code search page where you can search by road-name address or land-lot address. The page explains the purpose of the postal code reform and the current 5-digit postal code system.
What to Prepare
Before searching, prepare:
Korean road-name address
building number
district or city name
apartment or building name if needed
Practical Tip
Search in Korean whenever possible. Korean address databases usually work more accurately with Korean address input than English-translated addresses.
Step 2. Search by Korean Road-Name Address
The best method is to search by Korean road-name address.
Example Search
서울특별시 강남구 테헤란로 152
If the address is correct, the search result should show the matching address and the 5-digit postal code.
The official road-name address website is operated under Korea’s Ministry of the Interior and Safety system, and it provides road-name address search functions.
Step 3. Search by Land-Lot Address If Needed
Sometimes a landlord, hotel, Airbnb host, school, or older document may give you an old land-lot style address instead of a road-name address.
Old Land-Lot Style Example
강남구 역삼동 123-45
Modern Road-Name Style Example
서울특별시 강남구 테헤란로 152
Korea Post’s postal code search page includes both road-name address and land-lot number address search sections, which can help if you only have an older style address.
Step 4. Check the Correct 5-Digit Code
Once you find the result, check that the postal code has exactly 5 digits.
Correct Example
06236
Wrong or Outdated Example
123-456
If your postal code has a dash or 6 digits, it may be outdated. KoreaTESOL also notes that Korean postal codes changed to a new 5-digit system in August 2015.
Step 5. Copy the Postal Code Into Coupang or Delivery Apps
After finding the correct 5-digit postal code, copy it into the postal code field on Coupang, delivery apps, or other Korean websites.
Practical Rule
Use the postal code together with:
Korean road-name address
detailed address
apartment or room number
Korean phone number if required
If you are entering the postal code for Coupang, read our full guide on how to enter a Korean address on Coupang to avoid delivery mistakes.
Korean Postal Code Example
Let’s use a simple example.
Address Example
Main Address
서울특별시 강남구 테헤란로 152
Detailed Address
101동 1203호
Postal Code
06236
How to Use It on Coupang
Postal Code Field
06236
Main Address Field
서울특별시 강남구 테헤란로 152
Detailed Address Field
101동 1203호
Delivery Note Field
문 앞에 놓아주세요
Common Mistakes Foreigners Make With Korean Postal Codes
Mistake 1. Using an Old 6-Digit Postal Code
Some foreigners still receive old address information from landlords, schools, older websites, or old documents.
Why This Is a Problem
Korea now uses a 5-digit postal code system, so an old 6-digit code may not work correctly on modern Korean websites. Korea Post confirms that the 5-digit district number replaced the previous 6-digit postal code system.
Mistake 2. Searching Only in English
Many foreigners try to search their address in English first.
Why This Can Fail
Korean address systems are usually built around Korean road-name addresses. English translations can be helpful for understanding, but Korean input is usually more reliable when searching postal codes.
Mistake 3. Choosing a Similar Road Name
Some Korean road names look similar, especially in large cities like Seoul, Busan, Incheon, and Daejeon.
What to Check
Always check:
city or province
district
road name
building number
postal code
Mistake 4. Confusing Postal Code With Apartment Number
Your Korean postal code is not your apartment number.
Postal Code Example
06236
Apartment Number Example
101동 1203호
Both are needed for accurate delivery, but they are not the same thing.
Mistake 5. Copying From an Unverified Source
Some foreigners copy postal codes from random maps, old documents, or translated address pages.
Better Method
Use official lookup tools such as Korea Post or the official road-name address website when accuracy matters.
What If You Cannot Find Your Korean Postal Code?
If you cannot find your postal code, do not guess. Try the steps below.
First Try: Search Only the Road Name and Building Number
Example
테헤란로 152
This can work better than entering the full address with apartment or room details.
Second Try: Search the Korean Address, Not the English Address
If you have an English-translated address, ask for the Korean version.
Message You Can Send
도로명주소를 한글로 알려주세요.
Please send me the road-name address in Korean.
Third Try: Ask Your Landlord or Host
If you live in an apartment, officetel, villa, dormitory, hotel, or Airbnb, ask the person managing the place.
Message You Can Send
우편번호도 같이 알려주세요.
Please also send me the postal code.
Fourth Try: Use the Official Road-Name Address Website
The official road-name address website can help you confirm the correct address format and search address information.
Real-Life Situations Where Foreigners Need a Korean Postal Code
Coupang Address Setup
When adding a delivery address on Coupang, you may need the postal code, road-name address, detailed address, and phone number.
Internal Link Sentence
If you are entering your postal code for Coupang, read our full guide on how to enter a Korean address on Coupang to avoid delivery mistakes.
Delivery Apps
Delivery apps such as Baedal Minjok, Coupang Eats, or other Korean delivery platforms may require accurate address setup. Delivery app guides for foreigners explain that address setup and delivery instructions are key parts of using Korean delivery apps successfully.
Practical Tip
Postal code may not always be manually typed in every delivery app, but it is still part of the address system behind Korean delivery services.
Airbnb or Short-Term Stay
If you are staying in an Airbnb, hotel, guesthouse, or short-term rental, do not guess the postal code.
Message You Can Send
우편번호와 도로명주소를 알려주세요.
Please send me the postal code and road-name address.
School, Hospital, or Bank Forms
Some forms in Korea may ask for your address and postal code.
Practical Tip
Use your current Korean residence address, not your home country address, unless the form specifically asks for your overseas address.
International Shipping
If someone is sending a package to you in Korea from overseas, give them:
recipient name
phone number if needed
5-digit Korean postal code
full Korean address
detailed apartment or room number
Expat postal service guides also explain that Korean postal codes are five digits and that the current system replaced the previous six-digit format.
Korean Postal Code vs Zip Code: Are They the Same?
Many foreigners use the word zip code, especially if they are from the United States. In Korea, the more general term is postal code.
Simple Answer
For most online forms, Korean postal code and Korean zip code mean the same thing.
What to Enter
Enter the 5-digit Korean postal code.
Example
06236
Korean Phrases You Can Copy
Ask for Postal Code
Korean
우편번호 알려주세요.
English Meaning
Please tell me the postal code.
Ask for Road-Name Address
Korean
도로명주소 알려주세요.
English Meaning
Please tell me the road-name address.
Ask for Full Address
Korean [H4]
우편번호와 상세주소까지 같이 알려주세요.
English Meaning [H4]
Please send me the postal code and detailed address too.
Ask How to Write the Address [H3]
Korean
어떻게 적으면 되나요?
English Meaning
How should I write the address?
Best Korean Postal Code Template
Use this template when you prepare your address for Korean online shopping or delivery.
Copy-and-Paste Format
Postal Code
Your 5-digit Korean postal code
Main Address
시/도 + 구/군 + 도로명 + 건물번호
Detailed Address
동 + 호 or 층 + 호
Phone Number
Your Korean mobile phone number, if required
Example
Postal Code
06236
Main Address
서울특별시 강남구 테헤란로 152
Detailed Address
101동 1203호
Phone Number
010-0000-0000
Final Checklist Before Using Your Korean Postal Code
Before entering your postal code on Coupang, delivery apps, or Korean forms, check these points.
Checklist
Is the postal code 5 digits?
Did you search using the Korean road-name address?
Did you avoid old 6-digit postal codes?
Did you check the city and district?
Did you include the detailed address separately?
Did you copy the postal code from an official or reliable source?
Are you using the same address on Coupang, delivery apps, and forms?
New to Korean online shopping? Start with our full guide on how to use Coupang as a foreigner in Korea.
FAQ
How do I find my Korean postal code?
Use the official Korea Post postal code search tool or the official Korean road-name address website. Search your address in Korean road-name format and copy the correct 5-digit postal code. Korea Post explains that the current 5-digit district number replaced the old 6-digit postal code system.
Does Korea use zip codes or postal codes?
Korea uses postal codes, but many foreigners also call them zip codes. In most online forms, Korean zip code and Korean postal code refer to the same 5-digit number.
How many digits are Korean postal codes?
Korean postal codes have 5 digits. Korea Post states that the current 5-digit district number replaced the previous 6-digit postal code system.
Can I use an old 6-digit Korean postal code?
You should not use an old 6-digit code for modern Korean online forms unless the website specifically accepts it. Search again using Korea Post or the official road-name address website.
Why can’t I find my Korean postal code?
Common reasons include using an English-only address, entering an old land-lot address incorrectly, missing the building number, or using an outdated address. Try searching only the road name and building number in Korean.
Do I need a postal code for Coupang?
Yes, a correct Korean postal code helps ensure your address is accurate. If you are using Coupang, the postal code should match your road-name address and detailed address.
What is the difference between postal code and apartment number in Korea?
The postal code is a 5-digit number for the delivery area. Your apartment number is your exact unit, such as 101동 1203호. You need both for accurate delivery.
Where can I check my Korean postal code officially?
You can check it using Korea Post’s official postal code search tool or the official road-name address website.
