Population overview
Rockwall County is home to roughly 140,738 people, making up about 0.44% of the total population of Texas. Within the North Texas region, it ranks #10 of 36 counties by population. The combination of 149 square miles of land and 140,738 residents yields a density of about 944.6 people per square mile — typical of suburban Texas, with a mix of subdivisions, commercial corridors, and remaining rural land.
How Rockwall County compares
Compared with the other 253 Texas counties, Rockwall County sits in the top 25% of the population distribution. It belongs to the upper tier of Texas counties — sizable enough to support diverse local services and infrastructure.
| Comparison | Population | vs Rockwall |
|---|---|---|
| Rockwall County | 140,738 | — |
| North Texas region average | 252,448 | +79% |
| Texas county median | 18,916 | -87% |
| Largest in Texas (Harris) | 5,045,026 | +3485% |
Neighboring county populations
Rockwall County shares borders with 4 counties. Comparing population across an adjacent corridor often reveals commuting patterns, school-district pull, and economic gravity.
| County | Seat | Population | Density |
|---|---|---|---|
| Dallas County | Dallas | 2,661,397 | 3024.3 |
| Collin County | McKinney | 1,297,179 | 1529.7 |
| Kaufman County | Kaufman | 209,235 | 266.2 |
| Hunt County | Greenville | 123,336 | 146.7 |
Frequently asked questions
What is the population of Rockwall County, Texas?+
Rockwall County has an estimated population of 140,738 residents, based on the most recent U.S. Census data.
What is the population density of Rockwall County?+
Rockwall County has a population density of approximately 944.6 people per square mile across its 149 sq mi of land area — characteristic of a suburban county.
Where does Rockwall County rank among Texas counties by population?+
Rockwall County ranks #36 out of 254 Texas counties by total population, accounting for roughly 0.44% of the state's total population.
What is the most populous county near Rockwall County?+
Among the 4 counties bordering Rockwall, Dallas County is the most populous with about 2,661,397 residents.
How is Rockwall County's population measured?+
Population figures are sourced from the U.S. Census Bureau — the decennial census and annual American Community Survey (ACS) population estimates. See our methodology for full sourcing.