San Justo Population 2026
San Justo has a population of 105,274, making it the #38 biggest city in 🇦🇷 Argentina, located in Buenos Aires. Roughly 0.2% of Argentina's population lives here. It is about 27× smaller than Buenos Aires, the country's biggest city.
Population (city proper)
105,274
Rank in Argentina
#38
Coordinates
34.68°S, 58.56°W
~29 m elevation · America/Argentina/Buenos_Aires
Distance to capital (Buenos Aires)
19 km
12 miles, straight line
Other big cities in Buenos Aires
| City | Population | Rank in Argentina |
|---|---|---|
| Mar del Plata | 593,337 | #4 |
| Bahía Blanca | 299,101 | #10 |
| Merlo | 268,961 | #12 |
| Quilmes | 262,379 | #13 |
| José C. Paz | 230,208 | #18 |
| La Plata | 195,443 | #20 |
| Berazategui | 180,523 | #21 |
| San Miguel | 168,762 | #24 |
Cities near San Justo
- Haedo37,745 people · ~5 km away
- Villa Sarmiento17,481 people · ~5 km away
- Morón99,066 people · ~6 km away
- Castelar107,786 people · ~8 km away
- El Palomar59,031 people · ~8 km away
- Santos Lugares37,267 people · ~9 km away
FAQ
What is the population of San Justo?
San Justo has a population of 105,274 (city proper, latest official figure via GeoNames), making it the #38 biggest city in Argentina.
What region is San Justo in?
San Justo is located in Buenos Aires, Argentina.
Is San Justo the capital of Argentina?
No, the capital of Argentina is Buenos Aires, about 19 km away.
Sources & notes
Population refers to the city proper (municipal boundaries), not the metropolitan area. Source: GeoNames (CC BY 4.0), retrieved 2026-07-07. Country data: UN World Population Prospects 2024.
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