County outline
Where Lamar County is located
Area breakdown
Land accounts for 97.2% of Lamar County’s measured area and water for 2.8%. Its combined area converts to 2,416.7 square kilometers or approximately 597,186 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 907.335 | 2,349.987 | 580,694.4 |
| Water | 25.768 | 66.739 | 16,491.5 |
| Total | 933.103 | 2,416.726 | 597,185.9 |
How Lamar County compares
By original Census land area, Lamar County ranks #130 of 254 in Texas and #828 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 0.999 times the Texas county-equivalent median of 908.7 square miles. It accounts for 0.3% of the combined county land area in the state.
See the complete Texas ranking · What counts as a county equivalent?
Population and density of Lamar County
The Census Bureau estimates that 51,503 people lived in Lamar County on July 1, 2025. That ranks #1,006 of 3,222 county equivalents nationally and #74 of 254 in Texas. Since the April 1, 2020 estimates base of 50,083, the population has grown by 1,420 (+2.8%), compared with +8.8% for Texas as a whole.
With 907.3 square miles of land, that is 57 people per square mile (22 per km²), placing Lamar County #1,441 nationally for density and #72 in Texas. The median county equivalent has 47 people per square mile; the Texas median is 22. Put another way, there are about 11 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 50,131 | 50,359 | 50,488 | 51,155 | 51,342 | 51,503 |
| Change | — | +228 | +129 | +667 | +187 | +161 |
U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.
Cities and towns in Lamar County
7 incorporated places lie at least partly in Lamar County. Together they are home to 31,521 people (61.2%); the other 19,982 (38.8%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Paris city, with 25,205 residents in the county. Among places with at least 1,000 residents in 2020, Blossom city grew fastest since then (+6%).
| Incorporated place | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Paris cityCounty seat | 25,205 | +3% | 35.2 |
| Reno city | 3,575 | +3.4% | 4.103 |
| Blossom city | 1,493 | +6% | 3.304 |
| Roxton city | 556 | +1.3% | 0.863 |
| Deport cityAlso in 1 other county | 523 | 0% | 1.112 |
| Toco city | 92 | +1.1% | 0.17 |
| Sun Valley city | 77 | +8.5% | 0.161 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Lamar County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.
Metropolitan area
Lamar County is a central county of the Paris, TX Micropolitan Statistical Area. Its 2 county equivalents have 63,319 residents on 1,951.2 square miles of land; Lamar County accounts for 46.5% of the land and 81.3% of the residents. By combined land it ranks #83 of 542 micropolitan areas, and #148 by population.
| County equivalent | Population 2025 | Land mi² |
|---|---|---|
| Lamar County | 51,503 | 907.3 |
| Red River County | 11,816 | 1,043.9 |
ZIP codes
14 ZIP Code Tabulation Areas have land in Lamar County; 12 of them have most of their land inside the county, and the others mainly cover neighboring areas.
7541175416754217543475435754367544675460754627546875470754737547775486
ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.
Counties bordering Lamar County
Lamar County shares a land border with 5 county equivalents, including 2 in Oklahoma. It has more land than 4 of them. The largest neighbor is Red River County (1,043.9 mi²) and the smallest is Delta County (256.8 mi²). Together with its neighbors, Lamar County forms a block of 4,760.7 mi² of land, of which it holds 19.1%.
| Bordering county equivalent | Land mi² | Size vs. Lamar | Compare |
|---|---|---|---|
| Red River County | 1,043.9 | 1.2× larger | Compare |
| Bryan CountyOklahoma | 904.3 | about the same | Compare |
| Fannin County | 877.9 | about the same | Compare |
| Choctaw CountyOklahoma | 770.4 | 1.2× smaller | Compare |
| Delta County | 256.8 | 3.5× smaller | Compare |
How big is Lamar County compared with U.S. states?
Lamar County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.1 times as much. Texas’s county land could hold about 288 areas the size of Lamar County.
Another way to picture it: the same land area would fill a square about 30.1 miles (48.5 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.
State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.
What stands out about Lamar County?
Lamar County has more land than 2,394 of the other 3,221 county equivalents in the dataset.
A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.
Does including water change its rank?
Using land plus water places Lamar County at #874 nationally by total area, 46 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.
Its water share is 2.8%, compared with a national county-equivalent median of 1.2% — 1.6 percentage points higher. This describes the statistical geography’s land/water mix, not flood exposure or developable land.
Closest positions in the national land ranking
These entries sit immediately beside Lamar County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #827 | Hockley County, Texas | 908.4 | Compare |
| #828 | Lamar County, Texas | 907.3 | This county |
| #829 | Hemphill County, Texas | 906.3 | Compare |
Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.
Representative coordinates
The Census internal point is 33.667263, -95.570348. It represents a location inside the geography; it is not necessarily the centroid or the address of a courthouse.
Source and precision
U.S. Census Bureau, 2026 Gazetteer Files, Counties. Original ALAND: 2,349,985,883 m²; AWATER: 66,739,471 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.
Common questions
How big is Lamar County?
Lamar County, Texas has 907.3 square miles (2,350 km²) of land and 25.8 square miles of water, for a total area of 933.1 square miles. It ranks #828 of 3,222 U.S. county equivalents by land area.
Is Lamar County the largest county in Texas?
No. Lamar County ranks #130 of 254 in Texas by land area. The largest is Brewster County, with 6,183.8 square miles of land.
What counties border Lamar County?
Lamar County shares a land border with Red River County, Delta County, Choctaw County, Oklahoma, Fannin County, and Bryan County, Oklahoma.
What is the population of Lamar County?
The Census Bureau estimates Lamar County had 51,503 residents on July 1, 2025, ranking #1,006 of 3,222 county equivalents. That is 57 people per square mile of land.
What is the county seat of Lamar County?
The county seat of Lamar County is Paris.
What cities and towns are in Lamar County?
Lamar County has 7 incorporated places. The most populous five are Paris city, Reno city, Blossom city, Roxton city, and Deport city; 19,982 residents live outside any incorporated place.
Is Lamar County part of a metropolitan area?
Yes. It is a central county of the Paris, TX Micropolitan Statistical Area, which has 2 county equivalents and 63,319 residents.
How many ZIP codes are in Lamar County?
14 ZIP Code Tabulation Areas have land in Lamar County, and 12 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Lamar County compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 1.1 times as much land.
How many acres of land are in Lamar County?
The land measurement converts to approximately 580,694 acres. Including water, total area is approximately 597,186 acres. One square mile equals 640 acres.
Why might another source show a different area?
Check whether it reports land or total area, its Census vintage, and its rounding. Our guide explains how to reconcile county area figures.
Can this establish a property boundary?
No. Statistical measurements and generalized maps do not establish property lines. Consult the relevant local surveying or land-records authority.