| City: | Leander, Texas |
| County: | Williamson County |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 9:24:42 PM |
| Population: | No Population Data |
| Area Codes: | 512 / 737 |
| Classification: | PO Box |
| Coordinates: | 30.5707, -97.8366 |
| Quick Link: |
ZIP code 78646 is a PO Box ZIP for Leander, Texas, located in one of America's fastest-growing metropolitan areas. It doesn't have its own geographic territory. Instead, it exists as a point location within the boundaries of 78641, the standard Leander ZIP that handles residential street delivery.
The post office maintains 631 PO Boxes and serves 450 business delivery points. All 95 street-type ZIP+4 records point to a single address: S Highway 183. The UNIT designators indicate this is a commercial corridor with multiple business suites. There are 17 business establishments employing about 160 people registered to this ZIP.
Leander sits in Williamson County, part of the Austin-Round Rock metro area. Nearby subdivisions include Block House Creek (0.8 miles), Cedar Park Ranchettes (1.8 miles), and The Fairways at Crystal Falls (1.9 miles). Residents of these neighborhoods use 78641 for home delivery but may rent PO Boxes through 78646.
This isn't a PO Box Only Zone. Street delivery exists throughout Leander via 78641. The 78646 ZIP provides an alternative for businesses and residents who prefer PO Box service, whether for privacy, package security, or because they work along the Highway 183 commercial corridor.
Single commercial address with multiple unit designators along the highway corridor.
ZIP Code 78646 supports both business and residential activity. According to the Business Census (2024), there are 20 business establishments, employing about 152 people with an annual payroll of $10,992,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 3,285Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 20Source: CBP |
| 1st Quarter Payroll: | $4,196,000Source: CBP |
| Annual Payroll: | $10,992,000Source: CBP |
| # of Employees: | 152Source: CBP |
ZIP Code 78646 is located in Williamson County, Texas, within the Austin-Round Rock-San Marcos, TX Metropolitan Statistical Area (CBSA 12420) and Texas's 31st Congressional District. This Metro area has a population of 2,357,497 people, about 0.00% of whom live in ZIP Code 78646. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Austin-Round Rock-San Marcos, TXSource: Census |
| CBSA Number: | 12420Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 2,357,497Source: Census |
| MSA: | Austin-San Marcos, TX MSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 31Source: USPS |
| Congressional Land Area: | 2154.49 sq miSource: Census |
| PMSA: | --Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 4842016Source: Census |
| Place Name: | Leander city; TexasSource: Census |
ZIP Code 78646 is in the Liberty Hill Independent School District, which serves grades Pre-Kindergarten thru 12th. There are 1 public school(s) in this ZIP Code, and we have located 3 private school(s). It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on January 1, 2026.