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Treat the region as part of the statistic
A population value is only interpretable when you know the area it describes. A province, a metropolitan city, a county, and a neighborhood can all appear in Korean statistical tables. Their names may share familiar words, but the rows do not necessarily represent the same administrative level. Before comparing two values, identify each area's parent region and the geographic level used by the table.
Use Korea Data's Explore regions page to start with the area you need, then read the profile's full name and observation period. Keep the province or metropolitan-city name in your notes even when a chart shortens its labels. Names such as Jung-gu occur in multiple cities, so the district name alone is not a reliable identifier.
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Learn the labels without assuming one fixed ladder
At the broad regional level, South Korea includes provinces, special self-governing provinces, metropolitan cities, Seoul, and Sejong. The common combined label si-do refers to this broad level. Below it, many tables group cities, counties, and autonomous districts as si-gun-gu. A metropolitan city's English name includes city, but it is not the same level as an ordinary city within a province.
The suffixes are useful clues, not a substitute for a table's geography notes. A gu may be an autonomous district within a special or metropolitan city, or an administrative district within a larger ordinary city. The latter remains part of that city's total. Towns, townships, and neighborhoods appear at smaller scales; they should not be mixed with their parent totals in a single additive list.
| Label | Usual English meaning | Reading check |
|---|---|---|
| do | Province | Check the full current province name. |
| si | City | Distinguish broad-level cities from cities inside a province. |
| gun | County | Record the parent province or metropolitan city. |
| gu | District | Check whether it is autonomous or a subdivision of a city. |
| eup / myeon / dong | Town / township / neighborhood | Use the same small-area classification and date. |
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Watch for Sejong, Jeju, and neighborhood definitions
Do not force every region into province → city → district. Sejong is a special self-governing city with eup, myeon, and dong directly within it, without the usual intermediate tier of local governments. Jeju's Jeju-si and Seogwipo-si are administrative cities. Treat their legal status and statistical grouping as described by the source, rather than assuming all si rows are interchangeable.
Dong also needs care. Administrative neighborhoods, called haengjeong-dong, serve local administration; legal neighborhoods, called beopjeong-dong, identify legally defined areas. Their names and boundaries do not always match one for one. MOIS publishes separate resident-registration tables for these classifications. A value selected from one should not silently be matched to a map or address list using the other.
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Compare peers and keep totals separate
Suppose an invented province contains City A with 200,000 registered residents and County B with 50,000. Its total is 250,000. Adding all three rows gives 500,000 because the province already includes both children. This mistake is easy to make when a downloaded table contains a parent total followed by indented subdivisions.
For a comparison within that province, use the two peer areas. For a comparison between provinces, use the province total and other province-level totals. If you deliberately compare a district with its containing city, describe it as a share of the parent, not as two independent populations. A chart can display both, but its title and explanation should make the relationship clear.
A hypothetical district share
A city has 400,000 registered residents, including 80,000 in District C. District C represents 20% of the city total. The combined population is still 400,000, not 480,000. Use observations from the same month and population definition.
05 /
Check boundary changes before describing a trend
A region's population may jump when its boundary changes, even if nobody moves home. Mergers, transfers, and reclassification can also change which parent contains a smaller area. A familiar name does not guarantee identical coverage across a long time series. Record the regional code where provided and read notes around any sudden change.
If the source supplies a series adjusted to consistent boundaries, identify that adjustment in your notes. If it does not, compare within a period of stable geography or state that the before-and-after values cover different areas. Avoid inventing an adjusted total by subtracting partial figures from unrelated months.
- Write the full region name, parent area, and geographic level.
- Match the observation month and population definition across selected areas.
- Check whether a total already contains the subdivisions in your selection.
- For long comparisons, record boundary or classification changes and their dates.
- Use a population ranking only after confirming that its rows are comparable peers.
Sources and further reading
These references support the definitions and limits discussed in this guide. Worked scenarios labeled as examples are illustrative.
- National Geographic Information Institute: administrative regionsBackground on regional hierarchy and administrative reorganization. Historical counts on this atlas page are not presented as current counts in this guide.
- Korea Legislation Research Institute: establishment of SejongThe English translation's Article 5 explains Sejong's structure and direct eup, myeon, and dong subdivisions; cited for that structural distinction.
- Invest KOREA: Jeju administrative districtsIdentifies Jeju and Seogwipo as administrative cities. Smaller-area counts on the source page are historical and are not reproduced here.
- MOIS: resident-registration population tablesProvides separate administrative-neighborhood and legal-neighborhood table categories and identifies the resident-registration population scope.