Average GPS coordinates for Duncan Postcode location: 34.499, -97.905. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Duncan on map:

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Listing cities & postcodes (4):
>> Oklahoma, 73533 Duncan, Stephens, GPS coordinates: 34.5073,-97.9403
>> Oklahoma, 73534 Duncan, Stephens, GPS coordinates: 34.5189,-97.9733
>> Oklahoma, 73536 Duncan, Stephens, GPS coordinates: 34.4853,-97.8522
>> Oklahoma, 73575 Duncan, Stephens, GPS coordinates: 34.4853,-97.8522