Onawa, IA ZIP Codes, Coordinates & Counties
Onawa, Iowa has 1 ZIP code in Monona county. The approximate center of Onawa is 42.036, -96.08. Onawa has about 51,600 known street addresses.
ZIP codes in Onawa, IA
| ZIP Code | County | Latitude | Longitude |
|---|---|---|---|
| 51040 | Monona | 42.036 | -96.08 |
Counties Onawa spans
Monona
Most common streets in Onawa
10th, Dogwood, 15th, 11th, 12th, 9th, 5th, Pearl, 14th, 6th
Frequently asked questions
What ZIP codes are in Onawa, IA?
Onawa, Iowa has 1 ZIP code, ranging from 51040 to 51040. The full list, with each ZIP's county and coordinates, is in the table on this page.
What county is Onawa, IA in?
Onawa is in Monona county.
What are the latitude and longitude of Onawa, IA?
The approximate center of Onawa, Iowa is latitude 42.036, longitude -96.08. Coordinates for each ZIP code are listed in the table above.
How many ZIP codes does Onawa, IA have?
Onawa has 1 ZIP code.
How many addresses are in Onawa, IA?
Onawa, Iowa has about 51,600 known street addresses in the sthan.io US address database.
What are the most common streets in Onawa, IA?
Some of the most common street names in Onawa are 10th, Dogwood, 15th, 11th, 12th, 9th.
What cities are near Onawa, IA?
Cities near Onawa include Blencoe (9 mi), Whiting (9 mi), Decatur (10 mi), Castana (10 mi), Rodney (13 mi).
Cities near Onawa
Blencoe, IA (9 mi) Whiting, IA (9 mi) Decatur, NE (10 mi) Castana, IA (10 mi) Rodney, IA (13 mi) Little Sioux, IA (14 mi) Moorhead, IA (14 mi) Soldier, IA (15 mi)
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View the API →Last updated: June 2026 · Data: sthan.io US address database