100 Smallest ZIP Codes in the United States by Population in Sangamon 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 Sangamon County, Illinois.
| Rank | ZIP Code | City | State | Population |
|---|---|---|---|---|
| 1 | 62689 | THAYER | IL | 557 |
| 2 | 62536 | GLENARM | IL | 741 |
| 3 | 62625 | CANTRALL | IL | 874 |
| 4 | 62515 | BUFFALO | IL | 1,059 |
| 5 | 62701 | SPRINGFIELD | IL | 1,078 |
| 6 | 62539 | ILLIOPOLIS | IL | 1,151 |
| 7 | 62545 | MECHANICSBURG | IL | 1,296 |
| 8 | 62530 | DIVERNON | IL | 1,415 |
| 9 | 62661 | LOAMI | IL | 1,477 |
| 10 | 62520 | DAWSON | IL | 1,513 |
| 11 | 62693 | WILLIAMSVILLE | IL | 1,805 |
| 12 | 62677 | PLEASANT PLAINS | IL | 2,176 |
| 13 | 62670 | NEW BERLIN | IL | 2,514 |
| 14 | 62558 | PAWNEE | IL | 3,489 |
| 15 | 62561 | RIVERTON | IL | 5,107 |
| 16 | 62615 | AUBURN | IL | 5,490 |
| 17 | 62684 | SHERMAN | IL | 5,669 |
| 18 | 62563 | ROCHESTER | IL | 5,759 |
| 19 | 62707 | SPRINGFIELD | IL | 7,725 |
| 20 | 62712 | SPRINGFIELD | IL | 10,275 |
| 21 | 62629 | CHATHAM | IL | 15,245 |
| 22 | 62711 | SPRINGFIELD | IL | 17,759 |
| 23 | 62703 | SPRINGFIELD | IL | 28,809 |
| 24 | 62702 | SPRINGFIELD | IL | 32,539 |
| 25 | 62704 | SPRINGFIELD | IL | 40,495 |