1,206-CITY ATLASSOURCE-BACKED CITY REFERENCE
Argentina
Compare this sourced profile of Mar del Plata, Argentina before planning. Stable fields identify the place; confirm current transport, access and opening details with official sources.
01What the data says — and does not say
This page separates the checked GeoNames row for Mar del Plata—593,337, America/Argentina/Buenos_Aires, and source coordinates—from live travel claims. Those fields identify and compare the record; they do not prove current transport, accessibility, census totals, or a City Atlas Club visit.
Wikidata's localized description: city in Buenos Aires Province, Argentina.
02This city's dataset fingerprint
The source row behind Mar del Plata is GeoNames ID 3430863. Its recorded administrative path is Partido de General Pueyrredon → Buenos Aires → Argentina, and GeoNames classifies the place as a second-order administrative seat. Mar del Plata 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 2026-04-16; that date belongs to the source record, not to every transport or visitor detail in the real destination.
Within the fixed 1,206-record atlas, Mar del Plata ranks 944 by recorded population. Inside the 6 selected Argentina entries it ranks 4; inside the 198 entries in its broad region it ranks 152. Its 593,337 population value is 0.77 times the 770,825 median for the country cohort and 0.73 times the 816,326 regional median. Mar del Plata is rank 4 among the 6 selected Argentina entries, so a percentage band would overstate this small cohort. Mar del Plata's recorded value stays within one quarter of the country-cohort median used here. These comparisons describe this selected dataset only; they are not current census rankings or official urban-area boundaries.
Mar del Plata's three nearest other atlas coordinates are Montevideo at 365.463 km with 1,270,737 recorded people; Buenos Aires at 383.76 km with 2,891,082 recorded people; Rosario at 627.364 km with 948,312 recorded people. The closest-to-farthest distance spread is 261.901 km. Compared with Montevideo, Mar del Plata's recorded population is 0.47 times as large. Against Mar del Plata, Montevideo follows Municipio B → Montevideo Department → Uruguay in the source. Its point has higher latitude and higher longitude; it belongs to the selected Uruguay cohort rather than Argentina, uses America/Montevideo instead of America/Argentina/Buenos_Aires, and carries capital of a political entity rather than second-order administrative seat. Its recorded population is above Mar del Plata's. Against Mar del Plata, Buenos Aires follows Buenos Aires F.D. → Argentina in the source. Its point has higher latitude and lower longitude; it belongs to the same selected Argentina cohort, uses the shared America/Argentina/Buenos_Aires identifier, and carries capital of a political entity rather than second-order administrative seat. Its recorded population is above Mar del Plata's. Against Mar del Plata, Rosario follows Rosario Department → Santa Fe → Argentina in the source. Its point has higher latitude and lower longitude; it belongs to the same selected Argentina cohort, uses America/Argentina/Cordoba instead of America/Argentina/Buenos_Aires, and carries the same second-order administrative seat class. Its recorded population is above Mar del Plata's. Its nearest-neighbor distance ranks 1,151 of 1,206 from shortest to longest in the same snapshot. Mar del Plata'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 3430863, the coordinate pair 38.0004 / 57.5562, country rank 4 of 6, and neighbor GeoNames 3441575 at 365.463 km bind Mar del Plata to a reproducible comparison. That combined key distinguishes the row; it is not a recommendation or evidence of a physical connection.
Mar del Plata's reference point is 38.0004° south and 57.5562° west. The IANA identifier America/Argentina/Buenos_Aires is shared by 2 city rows in this catalog, while the GeoNames class PPLA2 is shared by 341 rows. Mar del Plata's row carries both second- and first-order administrative labels. Mar del Plata's point falls in the middle-latitude coordinate band used by this atlas's row checks. Mar del Plata's time-zone field defines the narrower catalog cohort; its place class is shared more broadly. GeoNames supplies no elevation for Mar del Plata, 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.
03Nearby atlas references
Mar del Plata's closest other entries in this atlas are Montevideo (365.463 km), Buenos Aires (383.76 km), Rosario (627.364 km).
04Verify before you book
Before visiting Mar del Plata, confirm changing decisions with current first-party sources:
Read how City Atlas Club verifies changing travel facts →05Sources and freshness
GeoNames updated the row 2026-04-16; the atlas checked the dataset 2026-08-04. Available Wikidata fields were verified in the same run.
GeoNames data: CC BY 4.0. Wikidata labels and descriptions: CC0 1.0.