| ZIP Codes: | 4 ZIP Codes (3 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Codes: | 214 / 469 / 945 / 972 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:14:01 PM |
| Population: | 132,930 [See All] |
| FIPS: | 48397 |
| CBSA: | Dallas-Fort Worth-Arlington, TX |
| Land Area: | 202 sq mi |
| Water Area: | 15 sq mi |
| Coordinates: | 32.9210, -96.3918 |
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132,930 residents live across 4 ZIPs covering 202 sq mi, served by 3 distinct USPS-recognized cities.
Population moved from 84,558 to 132,930 from 2014 to 2024 — a +57.2% change. 3 ZIPs gained residents, 1 lost.
The county's wealthiest ZIP 75032 (Rockwall, $135,742 median) and poorest ZIP 75189 (Royse City, $117,125) are 9.8 miles apart — a 1.2× income gap across local geography.
Median home values vary 1.4× across this county — from $356,600 in 75189 (Royse City) to $491,300 in 75032 (Rockwall).
Density varies 3× across the county — from 445 people/sq mi in 75189 (Royse City) to 1,285 in 75087 (Rockwall).
Most of the decade's growth concentrated around Rockwall — top growth ZIPs averaged +64.3% over the past ten years ( 75189 , 75087 and 75032 ).
Educational attainment ranges from 30.5% bachelor's+ in 75189 (Royse City) to 49.6% in 75032 (Rockwall) — the breadth of educational profiles across the area.
Within Texas, this is the #38 most populous of 254 counties and ranks #2 for median household income with the #3 fastest decade growth .
On the national stage, Rockwall County is ranks #65 for income , and #8 for decade growth .
Weighted by population, the typical household earns about $126,829 across the county — reflecting what a typical resident sees, not a simple ZIP average.
42.6% of adults age 25+ hold a bachelor's degree or higher (36,860 of 86,479 reporting). The most-educated ZIPs cluster around Rockwall.
3 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.