ZIP 77511 falls in Brazoria County, Texas, where we hold 27,040 parcels measured as septic county-wide and 130,065 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 77511.
ZCTA 77511 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) |
|---|---|---|---|---|
| Brazoria County, Texas | 87% | — | 27,040 | 130,065 |
| Galveston County, Texas | 13% | — | 15,694 | 150,353 |
1 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 |
|---|---|---|---|
| GM&I Services | Alvin | (832) 323-2256 | — |
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 27,040 parcels measured as septic for Brazoria County, Texas as a whole, not broken out by ZIP.
ZIP 77511 spans 2 counties: Brazoria County, Texas, Galveston County, Texas.