Map of Merlo, Argentina

Merlo is a city in Buenos Aires, Argentina, with a population of about 268,961. It lies at 34.6654°S, 58.7274°W. Merlo is about 33 km (20 mi) west of Buenos Aires, the capital. The nearest city on our map is Castelar, 8 km to the east.

Merlo at a glance

Where is Merlo?

• The 13th largest city in Argentina by recorded population.
• The 4th 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 Merlo

• Castelar — 8 km east
• Pontevedra — 10 km south
• Bella Vista — 12 km north
• Hurlingham — 12 km northeast
• Haedo — 13 km east
• San Miguel — 14 km north
• San Justo — 15 km east
• José C. Paz — 17 km north
• Villa de Mayo — 18 km north
• Los Polvorines — 18 km north

Largest cities in Buenos Aires

• Mar del Plata — 593,337
• Avellaneda — 367,554
• Bahía Blanca — 299,101
• Quilmes — 262,379
• José C. Paz — 230,208
• Lanús — 212,252
• La Plata — 195,443
• Berazategui — 180,523
• San Miguel — 168,762
• San Nicolás de los Arroyos — 134,217

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.