100 Largest ZIP Codes in the United States by Population in Grundy County, Iowa
Explore the 100 largest ZIP codes in the United States ranked by population using U.S. Census demographic data. This page lists ZIP codes located in Grundy County, Iowa.
| Rank | ZIP Code | City | State | Population |
|---|---|---|---|---|
| 1 | 50638 | GRUNDY CENTER | IA | 3,330 |
| 2 | 50669 | REINBECK | IA | 2,358 |
| 3 | 50624 | DIKE | IA | 1,694 |
| 4 | 50621 | CONRAD | IA | 1,641 |
| 5 | 50680 | WELLSBURG | IA | 1,124 |
| 6 | 50642 | HOLLAND | IA | 498 |
| 7 | 50609 | BEAMAN | IA | 381 |
| 8 | 50673 | STOUT | IA | 245 |
| 9 | 50657 | MORRISON | IA | 122 |