Average GPS coordinates for San Marcos Postcode location: 33.074, -117.012. (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 (4):
>> California, 92069 San Marcos, San Diego, GPS coordinates: 33.1444,-117.1697
>> California, 92078 San Marcos, San Diego, GPS coordinates: 33.1193,-117.185
>> California, 92079 San Marcos, San Diego, GPS coordinates: 33.0169,-116.846
>> California, 92096 San Marcos, San Diego, GPS coordinates: 33.0169,-116.846