Average GPS coordinates for San Marcos Postcode location: -9.556, -77.209. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). San Marcos on map:

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Listing cities & postcodes (1):
>> Ancash, 02391 San Marcos, Huari, GPS coordinates: -9.55557, -77.20858