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