Average GPS coordinates for Groton Postcode location: 45.45, -98.106. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Groton on map:

---

Listing cities & postcodes (1):
>> South Dakota, 57445 Groton, Brown, GPS coordinates: 45.4503,-98.1058