ZIP 77378 falls in Montgomery County, Texas, where we hold 58,102 parcels measured as septic county-wide and 238,683 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 77378.
ZCTA 77378 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) |
|---|---|---|---|---|
| Montgomery County, Texas | 60% | — | 58,102 | 238,683 |
| San Jacinto County, Texas | 40% | 1 | — | — |
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 |
|---|---|---|---|
| Erics Solutions & Septics | Willis | (936) 314-7626 | — |
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 58,102 parcels measured as septic for Montgomery County, Texas as a whole, not broken out by ZIP.
ZIP 77378 spans 2 counties: Montgomery County, Texas, San Jacinto County, Texas.