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Mar del Plata, 
Argentina
614,979 people lived in Mar del Plata in 2025. It is the 879th largest of the world's 12,138 cities, and the 7th largest in Argentina.
The UN measures every city in the world the same way, by where the buildings are rather than where the boundary runs, so this figure and Mar del Plata's own can differ widely. What counts as a city here.
Verified 2026-09-30 · 73 canaries
People · every five years · 1975 to 2050
How Mar del Plata grew
Count 10 people in Mar del Plata in 1975 and the same count gives 18.4 in 2025.
On the UN's projection it will have 633,768 people in 2050.
projected (after 2025) · how sure the UN is: high moderate low
How to read this: read it left to right, 1975 to 2050, one column every five years, the height being people. Hatching marks the projected years. Below, a strip of the UN's confidence: strong colour where the census maps are recent and detailed, pale where they are not, blank where the place was not counted as a city.
People · your family's years · 1975 to 2050
Mar del Plata through your family’s years
Put in the years your family were born. You’ll see how many people lived in Mar del Plata in each of those years, and when each of them turned 30.
Argentina · every city · 2025
Where it is
How to read this: every dot is one of the 77 cities in Argentina in 2025, and a dot's area is how many people live there, the biggest being Buenos Aires. The ringed dot in colour is Mar del Plata; the grey dots are the rest. The outlines around them are neighbouring countries.
Area and built-up land · km²
How much land it covers
In 2025, Mar del Plata covered 127 km², and buildings, roads and other built-up land covered 38 km² of it. That is 62 m² of built-up land for each person, about a square 8 by 8 metres. Since 1975, its built-up land has grown by 40%, and its people have grown by 84%.
How to read this: the outer pale square stands for all the land the city covers, and the solid square inside it for the part with buildings, roads and the like on it. All three squares share a scale, so you can compare them by eye. A hatched one is a year the UN has projected.
Of every 100 people in Argentina
Its share of Argentina
Of every 100 people in Argentina in 2025, 1 lived in Mar del Plata, which is 614,979 people.
How to read this: shrink Argentina to 100 people and this is what you get. The coloured squares are the ones who would live in Mar del Plata; the grey ones are everybody else, in other cities, in towns and out in the country.
Ranked by people · 2025
Cities of a similar size
In the world, 2025
- 875 Bristol United Kingdom615,703
- 876 Ambala India615,565
- 877 Reynosa Mexico615,168
- 878 Ribeirao Preto Brazil615,090
- 879 Mar del Plata614,979
- 880 Lipa Philippines614,898
- 881 Salta613,956
- 882 Suining China613,678
- 883 Uberlândia Brazil613,434
In Argentina, 2025
- 445 Rosario1,151,717
- 495 Mendoza1,027,849
- 541 San Miguel de Tucumán959,565
- 720 La Plata742,952
- 879 Mar del Plata614,979
- 881 Salta613,956
- 1198 San Juan464,466
- 1391 Resistencia406,337
- 1447 Santiago del Estero393,257
How to read this: the number before each name is its place among all 12,138 cities in the world in 2025; bars are people, on one scale per list. Only cities that reach 300,000 people have a page here, so a gap in the numbers is a smaller city.
Apparatus
Sources and method
The figures for Mar del Plata are the UN's own, at five-year steps: an estimate for each of 1975 to 2025, then projection to 2050. Projected years are drawn hatched, and the UN publishes no range of uncertainty for a city. What a city means here, how the UN measures one, and why that number can differ from the one Mar del Plata publishes about itself: how the figures here are put together.
Sources: UN WUP 2025 · Natural Earth · flag-icons. Every source, its licence and how to cite it →
Verified 2026-09-30 · 73 canaries