ZIP 78613 falls in Williamson County, Texas, where we hold 110,116 parcels measured as septic county-wide and 176,652 on sewer. We do not have a per-ZIP parcel count for this county, so this is the county total, not a count specific to ZIP 78613.
ZCTA 78613 is not entirely inside one county. Land-area share is from the 2020 Census ZCTA-to-county relationship file.
| County | Land in this ZIP | Documents held | On septic (county) | On sewer (county) |
|---|---|---|---|---|
| Williamson County, Texas | 89% | — | 110,116 | 176,652 |
| Travis County, Texas | 11% | 164,420 | 34,543 | 337,990 |
3 businesses on record with an address in this ZIP: pumping, installation, design, inspection and repair. Not an endorsement, and we take no fee.
| Company | City | Phone | Rating |
|---|---|---|---|
| Septic Cheetah | Cedar Park | (512) 969-9655 | 5.0 (2) |
| Super Septic Bros | Cedar Park | (512) 350-9478 | 5.0 (1) |
| All Cen Tex Septic & Vacuum Pumping | Cedar Park | (512) 258-4000 | 4.2 (30) |
Land-area overlap is from the 2020 Census Bureau ZCTA5-to-county relationship file, not an estimate of ours. Parcel and document counts are rows we hold, not a survey of every property in the ZIP. Last verified 2026-09-01.
We hold 110,116 parcels measured as septic for Williamson County, Texas as a whole, not broken out by ZIP.
ZIP 78613 spans 2 counties: Williamson County, Texas, Travis County, Texas.