Source identity and administrative path
The source row behind Haiphong is GeoNames ID 1581298. Its recorded administrative path is Hai Phong → Vietnam, and GeoNames classifies the place as a first-order administrative seat. Haiphong occurs once as a primary city label in this atlas sample; the numeric ID remains the durable source key if names change. The city row itself was updated 2026-04-14; that date belongs to the source record, not to every transport or visitor detail in the real destination.
Population position inside fixed cohorts
Within the fixed 1,206-record atlas, Haiphong ranks 148 by recorded population. Inside the 13 selected Vietnam entries it ranks 3; inside the 632 entries in its broad region it ranks 94. Its 2,625,200 population value is 2.06 times the 1,272,235 median for the country cohort and 2.60 times the 1,008,426 regional median. Haiphong falls between the leading tenth and quarter of this atlas's Vietnam population cohort. Haiphong's recorded value reaches at least twice the country-cohort median in this snapshot. These comparisons describe this selected dataset only; they are not current census rankings or official urban-area boundaries.
Nearest-reference pattern
Haiphong's three nearest other atlas coordinates are Hanoi at 89.253 km with 8,053,663 recorded people; Thanh Hóa at 152.171 km with 850,000 recorded people; Qinzhou at 238.549 km with 1,296,300 recorded people. The closest-to-farthest distance spread is 149.296 km. Compared with Hanoi, Haiphong's recorded population is 0.33 times as large. Against Haiphong, Hanoi follows Hanoi → Vietnam in the source. Its point has higher latitude and lower longitude; it belongs to the same selected Vietnam cohort, uses the shared Asia/Bangkok identifier, and carries capital of a political entity rather than first-order administrative seat. Its recorded population is above Haiphong's. Against Haiphong, Thanh Hóa follows Thanh Pho Thanh Hoa → Thanh Hoa Province → Vietnam in the source. Its point has lower latitude and lower longitude; it belongs to the same selected Vietnam cohort, uses the shared Asia/Bangkok identifier, and carries the same first-order administrative seat class. Its recorded population is below Haiphong's. Against Haiphong, Qinzhou follows Qinzhou Shi → Guangxi → China in the source. Its point has higher latitude and higher longitude; it belongs to the selected China cohort rather than Vietnam, uses Asia/Shanghai instead of Asia/Bangkok, and carries second-order administrative seat rather than first-order administrative seat. Its recorded population is below Haiphong's. Its nearest-neighbor distance ranks 650 of 1,206 from shortest to longest in the same snapshot. Haiphong's nearest-coordinate gap belongs to the wider half of atlas distances. This pattern can reveal whether other catalog references are geographically close, but it cannot establish whether a border crossing is possible or practical, or whether rail, road, fare, or journey-time connections exist. Read as one record signature, GeoNames 1581298, the coordinate pair 20.8648 / 106.6835, country rank 3 of 13, and neighbor GeoNames 1581130 at 89.253 km bind Haiphong to a reproducible comparison. That combined key distinguishes the row; it is not a recommendation or evidence of a physical connection.
Coordinate, time-zone and class cohorts
Haiphong's reference point is 20.8648° north and 106.6835° east. The IANA identifier Asia/Bangkok is shared by 7 city rows in this catalog, while the GeoNames class PPLA is shared by 429 rows. Haiphong's row carries a first-order administrative label but no second-order label. Haiphong's point falls in the lower-latitude coordinate band used by this atlas's row checks. Haiphong's time-zone field defines the narrower catalog cohort; its place class is shared more broadly. GeoNames supplies no elevation for Haiphong, so the profile preserves that missing value instead of guessing terrain. Together these fields form a reproducible identity check for this page, not a claim about walkability, climate or accessibility.
- Record keys
- Haiphong · GeoNames 1581298 · no verified Wikidata entity
- Name scope
- Haiphong · 1 atlas row share this source label · qualifier not required
- Administrative chain
- Hai Phong · Vietnam
- Coordinate signature
- 20.8648° N · 106.6835° E
- Population snapshot
- 2,625,200 · atlas rank 148 of 1,206
- Country comparison
- Vietnam rank 3 of 13 · median 1,272,235 · ratio 2.06×
- Regional comparison
- Asia rank 94 of 632 · median 1,008,426 · ratio 2.60×
- Time-zone cohort
- Asia/Bangkok · 7 of 1,206 atlas rows
- Place-class cohort
- PPLA first-order administrative seat · 429 of 1,206 rows
- Elevation field
- Haiphong · missing in GeoNames
- Nearest reference
- Hanoi · 89.253 km · population 8,053,663 · atlas rank 33
- Second reference
- Thanh Hóa · 152.171 km · population 850,000 · atlas rank 656
- Third reference
- Qinzhou · 238.549 km · population 1,296,300 · atlas rank 391
- Neighbour geometry
- Haiphong · nearest-distance rank 650 of 1,206 · three-reference spread 149.296 km
- Source dates
- Haiphong row updated 2026-04-14 · atlas dataset checked 2026-08-04