Population overview
Lamar County is home to roughly 51,503 people, making up about 0.16% of the total population of Texas. Within the East Texas region, it ranks #19 of 44 counties by population. The combination of 917 square miles of land and 51,503 residents yields a density of about 56.2 people per square mile — characteristic of small-town and exurban Texas, where towns are anchored by a county seat surrounded by working farmland and ranches.
How Lamar County compares
Compared with the other 253 Texas counties, Lamar County sits in the upper half of the population distribution. It represents the broad middle of Texas — small to mid-sized counties with a clear county seat and a regionally rooted economy.
| Comparison | Population | vs Lamar |
|---|---|---|
| Lamar County | 51,503 | — |
| East Texas region average | 64,981 | +26% |
| Texas county median | 18,916 | -63% |
| Largest in Texas (Harris) | 5,045,026 | +9696% |
Neighboring county populations
Lamar County shares borders with 3 counties. Comparing population across an adjacent corridor often reveals commuting patterns, school-district pull, and economic gravity.
| County | Seat | Population | Density |
|---|---|---|---|
| Fannin County | Bonham | 39,265 | 44.0 |
| Red River County | Clarksville | 11,816 | 11.3 |
| Delta County | Cooper | 5,549 | 20.0 |
Frequently asked questions
What is the population of Lamar County, Texas?+
Lamar County has an estimated population of 51,503 residents, based on the most recent U.S. Census data.
What is the population density of Lamar County?+
Lamar County has a population density of approximately 56.2 people per square mile across its 917 sq mi of land area — characteristic of a small-town / exurban county.
Where does Lamar County rank among Texas counties by population?+
Lamar County ranks #74 out of 254 Texas counties by total population, accounting for roughly 0.16% of the state's total population.
What is the most populous county near Lamar County?+
Among the 3 counties bordering Lamar, Fannin County is the most populous with about 39,265 residents.
How is Lamar 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.