Postal code

South Korea postal codes

Q: What is the postal code format in South Korea?

South Korea postal codes follow the pattern ##### (# = digit, @ = letter), i.e. 5 digits. Examples: 03051.

Q: What regex validates South Korea postal codes?

^(?:\d{5})$ matches the official format (from Google's address metadata). It checks the shape only; whether a code exists needs a lookup in a postal code database such as the zipcodestack API.

South Korea postal codes have the format ##### (5 digits), for example 03051. zipcodestack has 35,832 postal codes for South Korea in 17 provinces.

Format: #####
Example: 03051
Codes in our database: 35,832
Local name: 우편번호

South Korea postal code format

Pattern	##### (# digit, @ letter)
Examples	03051
Regex	`^(?:\d{5})$`
Official lookup	www.epost.go.kr

Format and regex from Google's address metadata (libaddressinput). The regex checks the shape of a code, not whether it exists.

Postal Codes by province

Province	Range	Codes
Busan	46000 – 49527	2,295
Chungcheongnam-do	31000 – 33677	1,685
Daegu	41000 – 43024	1,494
Daejeon	34000 – 35428	1,106
Gangwon-do	24000 – 26509	1,802
Gwangju	61000 – 62466	1,003
Gyeonggi-do	10000 – 18635	6,155
Gyeongsangbuk-do	36000 – 40240	3,168
Gyeongsangnam-do	50000 – 53337	2,334
Incheon	21000 – 23136	1,296
Jeju-do	63000 – 63644	511
Jeollabuk-do	54000 – 56469	1,557
Jeollanam-do	57000 – 59791	1,920
North Chungcheong	27000 – 29167	1,525
Sejong-si	30000 – 30154	142
Seoul	01000 – 08866	5,628
Ulsan	44000 – 45015	628

South Korea postal codes: FAQ

What is the postal code format in South Korea?

South Korea postal codes follow the pattern ##### (# = digit, @ = letter), i.e. 5 digits. Examples: 03051.

What regex validates South Korea postal codes?

^(?:\d{5})$ matches the official format (from Google's address metadata). It checks the shape only; whether a code exists needs a lookup in a postal code database such as the zipcodestack API.

What is the postal code of Seoul?

Seoul has 6999 postal codes, starting with 01000. The right one depends on the street; see the full list for Seoul.

How many postal codes are there in South Korea?

The zipcodestack database contains 35,832 postal codes for South Korea, each with place name, region and coordinates.

Postal code API

Look up South Korea postal codes by API

zipcodestack looks up, validates and searches postal codes in 149 countries: city, state, coordinates, distances and radius search, as JSON.

/v1/search documentation International postal code API All documentation

300 free requests every month. No credit card required.

GET https://api.zipcodestack.com/v1/search?codes=03051&country=kr

{
  "results": {
    "03051": [{
      "postal_code": "03051",
      "country_code": "KR",
      "city": "…",
      "state": "…",
      "latitude": …,
      "longitude": …
    }]
  }
}

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