What county is Leander, TX in?
Updated · Data: U.S. Census Bureau
Leander, Texas is in 2 counties. Most residents (85.3%) live in the Williamson County part; the rest live in Travis County.
Which counties do Leander residents live in?
| County | Share of residents | Chart |
|---|---|---|
| Williamson County | 85.3% (57,882 people) | |
| Travis County | 14.7% (9,998 people) |
How is Leander's land split between counties?
| County | Share of land area | Chart |
|---|---|---|
| Williamson County | 75.8% | |
| Travis County | 24.2% |
Inside Leander, the county depends on the address: check your address privately. See all Texas cities in more than one county or look up another city.
Leander at a glance
What ZIP codes are in Leander?
3 ZIP codes use the name Leander or are centered in it. Shares are of each ZIP's land; a ZIP named after a town can reach beyond its city limits.
| ZIP | Post office name | County (land share) |
|---|---|---|
| 78641 | Leander | Travis County 63%, Williamson County 37% |
| 78645 | Leander | Travis County |
| 78646 | Leander | Williamson County |
About Williamson County
County seat: Georgetown. FIPS code 48491. Population 643,889. All Williamson County facts.
Towns near Leander
- Cedar Park: 5.1 mi away, Williamson County
- Santa Rita Ranch: 6.4 mi away, Williamson County
- Liberty Hill: 6.7 mi away, Williamson County
- Jonestown: 7.6 mi away, Travis County
- Brushy Creek: 8.4 mi away, Williamson County
- Lago Vista: 11 mi away, Travis County
Leander has about 67,880 people. It is an incorporated city or town.
Sources: ACS 2019-2023 5-year (residents by county, table B01003); Census TIGER/Line 2024 and Gazetteer 2024 (land, location); Census 2020 ZCTA file and GeoNames (ZIP codes). Data as of November 1, 2026. Not affiliated with any government agency.
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