Average GPS coordinates for Seneca Postcode location: 41.315, -88.61. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Seneca on map:

---

Listing cities & postcodes (1):
>> Illinois, 61360 Seneca, La Salle, GPS coordinates: 41.3152,-88.61