How Korean addresses work

Two systems, one of which is obsolete

Until 2014 Korean addresses were based on land lot numbers (지번주소) — a cadastral system inherited from the colonial period in which numbers were assigned in the order plots were registered rather than by position. Lot 15 could be nowhere near lot 16. Finding an address meant knowing the neighbourhood.

The road-name system (도로명주소) replaced it: named roads with sequentially numbered buildings, even on one side and odd on the other, exactly as most of the world does it.

Lot-number addresses remain legally valid and older residents still use them conversationally, but every official process, courier and mapping service now runs on road names. If you have a lot-number address, look up its road-name equivalent at juso.go.kr, which has an English interface.

The anatomy of an address

Korean addresses run largest unit first:

English reverses the order entirely:

This reversal is the single most common mistake on international shipping forms, and it is the reason parcels come back.

The administrative hierarchy

Seoul and the six metropolitan cities — Busan, Daegu, Incheon, Gwangju, Daejeon and Ulsan — take no suffix at all in English. It is Seoul, never "Seoul-si" and certainly never "Seoul Teukbyeolsi". Sejong is the exception and takes -si.

Road types

Numbered branch streets are common: 서초대로77길 is the 77th 길 branching from 서초대로, written Seocho-daero 77-gil. The number belongs to the 길, not to the building.

Why Jong-ro is not Jongno

This is where most online converters go wrong, and it is genuinely interesting.

Korean has systematic sound changes across syllable boundaries. In 종로, the ㅇ ending 종 and the ㄹ beginning 로 assimilate, and the word is pronounced closer to "Jongno". Ordinary Revised Romanization reflects that: the district 종로구 is officially Jongno-gu.

But the road-name standard treats the suffix as a separate unit across a hyphen, and deliberately does not apply the sound change. So the road 종로 is written Jong-ro on the street sign and on official address records.

Our address romanizer implements both behaviours — sound changes for place names, none across the road-name hyphen — which is why it produces the form that matches the official record.

Filling in a Western checkout form

Foreign shopping sites almost never have fields that match a Korean address. This mapping works reliably:

If the form demands a state from a fixed dropdown and Korea is not in it, put the metropolitan city or province in the city field and leave the state blank. Korean domestic routing works from the postal code.

Practical points

Use the five-digit postal code

Korea moved from six digits to five in 2015. The old codes are dead. If a site or a form still has your old six-digit code stored, update it.

You do not need the dong

Under the road-name system, the road plus the building number uniquely identifies the address. The neighbourhood name is redundant and is often printed in brackets purely for familiarity. Including it does no harm; omitting it does none either.

Put the Hangul on incoming parcels too

The international leg routes on the country and postal code; the domestic leg is delivered by a Korean courier who reads Hangul far faster than romanized text. If the form allows two address lines, English on one and Hangul on the other is the pragmatic answer.

Building names carry real information

Korean apartment complexes are addressed by building and unit: 101동 1502호 means building 101, unit 1502. In English that becomes "Apt 101-1502" or "Bldg 101, Unit 1502". The unit number usually encodes the floor — 1502 is the 15th floor.

Registering your address is a legal obligation

Foreign residents must report an address change within 14 days of moving. It is free, takes ten minutes at your local district office, and failing to do it is a reportable violation that costs F-2-7 points years later. It is the most commonly missed obligation in the entire system.

It also matters for housing: your address registration is part of what protects a jeonse or wolse deposit.