Average GPS coordinates for San Marcos Postcode location: -6.611, -76.919. (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 (2):
>> San Martin, 22630 San Marcos, Huallaga, GPS coordinates: -7.08333, -76.73333
>> San Martin, 22810 San Marcos, Moyobamba, GPS coordinates: -6.13917, -77.10389