100 Smallest ZIP Codes in the United States by Population in Winnebago County, Illinois
Explore the 100 smallest ZIP codes in the United States ranked by population using U.S. Census demographic data. This page lists ZIP codes located in Winnebago County, Illinois.
| Rank | ZIP Code | City | State | Population |
|---|---|---|---|---|
| 1 | 61112 | ROCKFORD | IL | 113 |
| 2 | 61077 | SEWARD | IL | 118 |
| 3 | 61079 | SHIRLAND | IL | 213 |
| 4 | 61024 | DURAND | IL | 2,524 |
| 5 | 61063 | PECATONICA | IL | 4,144 |
| 6 | 61016 | CHERRY VALLEY | IL | 5,185 |
| 7 | 61088 | WINNEBAGO | IL | 6,094 |
| 8 | 61080 | SOUTH BELOIT | IL | 10,780 |
| 9 | 61072 | ROCKTON | IL | 11,077 |
| 10 | 61114 | ROCKFORD | IL | 15,017 |
| 11 | 61102 | ROCKFORD | IL | 16,875 |
| 12 | 61104 | ROCKFORD | IL | 18,306 |
| 13 | 61101 | ROCKFORD | IL | 20,481 |
| 14 | 61073 | ROSCOE | IL | 20,567 |
| 15 | 61115 | MACHESNEY PARK | IL | 22,542 |
| 16 | 61111 | LOVES PARK | IL | 22,756 |
| 17 | 61103 | ROCKFORD | IL | 23,441 |
| 18 | 61109 | ROCKFORD | IL | 26,382 |
| 19 | 61107 | ROCKFORD | IL | 29,386 |
| 20 | 61108 | ROCKFORD | IL | 29,673 |