Zip Code 78674 — Weir, TX
78674 is a ZIP Code associated with Weir, TX, located within Williamson. 78674 ranks #18 out of 19 ZIP codes in Williamson County by population (and #1808 out of 1,990 in TX). The area supports an estimated population of 108 residents across Data Pending housing units, with a population density of 116.6 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (30.672130, -97.596530)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 78674 |
| Primary City | Weir |
| State / Province | TX |
| County | Williamson |
| Total Population | 108 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 116.6 people/sq mi |
| Timezone | America/Chicago |
How 78674 Compares
| Metric | ZIP 78674 | Williamson County | TX State Average |
|---|
| Population | 108 | 591,187 (Total) | 30,188,035 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 116.6 /sq mi | -- | -- |
| County Pop Rank | #18 of 19 | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →