100 Smallest ZIP Codes in the United States by Population in Williamson County, Texas
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 Williamson County, Texas.
| Rank | ZIP Code | City | State | Population |
|---|---|---|---|---|
| 1 | 76573 | SCHWERTNER | TX | 27 |
| 2 | 78674 | WEIR | TX | 233 |
| 3 | 76578 | THRALL | TX | 1,232 |
| 4 | 78615 | COUPLAND | TX | 1,781 |
| 5 | 76511 | BARTLETT | TX | 2,390 |
| 6 | 76530 | GRANGER | TX | 2,424 |
| 7 | 76527 | FLORENCE | TX | 4,141 |
| 8 | 76537 | JARRELL | TX | 11,501 |
| 9 | 76574 | TAYLOR | TX | 19,629 |
| 10 | 78642 | LIBERTY HILL | TX | 20,699 |
| 11 | 78633 | GEORGETOWN | TX | 27,292 |
| 12 | 78729 | AUSTIN | TX | 31,309 |
| 13 | 78717 | AUSTIN | TX | 34,499 |
| 14 | 78626 | GEORGETOWN | TX | 40,758 |
| 15 | 78634 | HUTTO | TX | 41,099 |
| 16 | 78628 | GEORGETOWN | TX | 41,428 |
| 17 | 78681 | ROUND ROCK | TX | 57,760 |
| 18 | 78665 | ROUND ROCK | TX | 61,640 |
| 19 | 78664 | ROUND ROCK | TX | 62,168 |
| 20 | 78641 | LEANDER | TX | 87,106 |
| 21 | 78613 | CEDAR PARK | TX | 88,189 |