Neptune, Iowa
Neptune: a city in Plymouth County, Iowa.
About
Neptune is a city located in the county of Plymouth in the U.S. state of Iowa.
Quick Facts about Neptune
| State | Iowa (United States) |
| County | Plymouth County |
| Latitude & Longitude | 42.6636,-96.1561 |
| Time Zone | America/Chicago |
| Local time | 10:34:21 (6th November 2026) |
| Weather | 44℉ Partly Sunny 7-days weather |
Geography
Neptune is located at 42°39'49"N 96°9'22"W (42.6636000, -96.1561300).
Neptune map
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Weather
44°F
Partly Sunny
0 to 5 mph ESE
Today
Partly sunny. High near 44, with temperatures falling to around 41 in the afternoon. East southeast wind 0 to 5 mph.
7-Day ForecastNearby Schools and Colleges
Schools and campuses linked to Neptune, IA. Select a name to open its map and contact details.
| Code | Name | City | ZIP |
|---|---|---|---|
| 154262 | St Luke's College | Sioux City (IA) | 51104-0263 |
Closest post offices linked to Neptune.
| Post Office Name | City | ZIP |
|---|---|---|
| Merrill Post Office | Merrill (IA) | 51038 |
Other cities in Plymouth County
Cities, towns, neighborhoods & other populated places in Plymouth County , IA.
| City Name | Population | Title |
|---|---|---|
| Le Mars | 10,195 | City in Iowa, United States |
| Remsen | 1,607 | City in Plymouth County, Iowa, United States of America |
| Akron | 1,454 | City in Plymouth County, South Dakota, United States |