Map of San Justo, Argentina

San Justo is a city in Buenos Aires, Argentina, with a population of about 105,274. It lies at 34.6811°S, 58.5638°W. San Justo is about 19 km (12 mi) southwest of Buenos Aires, the capital. The nearest city on our map is Haedo, 5 km to the northwest.

San Justo at a glance

Where is San Justo?

• The 40th largest city in Argentina by recorded population.
• The 16th largest city in Buenos Aires on this site.
• Located in the Southern and Western hemispheres.
• Daylight ranges from about 9 h 50 min on the shortest day to 14 h 29 min on the longest day (around 21 June and 21 December).

Cities near San Justo

• Haedo — 5 km northwest
• Castelar — 8 km northwest
• Santos Lugares — 9 km north
• Hurlingham — 12 km northwest
• Pontevedra — 15 km southwest
• Merlo — 15 km west
• Lanús — 16 km east
• Lomas de Zamora — 17 km southeast
• Bella Vista — 17 km northwest
• Avellaneda — 18 km east

Largest cities in Buenos Aires

• Mar del Plata — 593,337
• Avellaneda — 367,554
• Bahía Blanca — 299,101
• Merlo — 268,961
• Quilmes — 262,379
• José C. Paz — 230,208
• Lanús — 212,252
• La Plata — 195,443
• Berazategui — 180,523
• San Miguel — 168,762

Largest cities in Argentina

• Buenos Aires — 2,891,082
• Córdoba — 2,106,734
• Rosario — 948,312
• Mar del Plata — 593,337
• San Miguel de Tucumán — 548,866
• Salta — 520,683
• Santa Fe — 391,164
• Avellaneda — 367,554
• Corrientes — 346,334
• Posadas — 305,874

Map of Argentina and all its cities →

Sources: place names, coordinates, populations and time zones from GeoNames (CC BY 4.0, data retrieved October 2026). Population figures are the latest values recorded in GeoNames; depending on the country they refer to the city proper, a municipality or a wider urban area, so they can differ from census or metro-area figures. Map © OpenStreetMap contributors.