Map of San Martin, Peru

San Martin is a city in Piura, Peru, with a population of about 130,000. It lies at 5.1859°S, 80.6693°W. San Martin is about 861 km (535 mi) northwest of Lima, the capital. The nearest city on our map is Piura, 4 km to the east.

San Martin at a glance

Where is San Martin?

• The 21st largest city in Peru by recorded population.
• The 3rd largest city in Piura on this site.
• Located in the Southern and Western hemispheres.
• Daylight ranges from about 11 h 49 min on the shortest day to 12 h 25 min on the longest day (around 21 June and 21 December).

Cities near San Martin

• Piura — 4 km east
• Catacaos — 9 km south
• La Unión — 25 km south
• Sullana — 31 km north
• Paita — 50 km west
• Chulucanas — 57 km east
• Talara — 95 km northwest
• Lambayeque — 188 km southeast
• Ferreñafe — 189 km southeast
• Picsi — 197 km southeast

Largest cities in Piura

• Piura — 630,000
• Sullana — 160,789
• Talara — 99,074
• Chulucanas — 68,835
• Catacaos — 57,304
• Paita — 56,151
• La Unión — 34,834

Largest cities in Peru

• Lima — 7,737,002
• Callao — 1,226,200
• Arequipa — 1,195,700
• Trujillo — 1,067,700
• Piura — 630,000
• Chiclayo — 609,400
• Huancayo — 456,250
• Cusco — 428,450
• Iquitos — 377,609
• Pucallpa — 326,040

Map of Peru 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.