County outline
Where Tensas Parish is located
Area breakdown
Land accounts for 94% of Tensas Parish’s measured area and water for 6%. Its combined area converts to 1,662 square kilometers or approximately 410,684 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 603.302 | 1,562.545 | 386,113.3 |
| Water | 38.391 | 99.432 | 24,570.2 |
| Total | 641.693 | 1,661.977 | 410,683.5 |
How Tensas Parish compares
By original Census land area, Tensas Parish ranks #39 of 64 in Louisiana and #1617 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 0.934 times the Louisiana county-equivalent median of 645.9 square miles. It accounts for 1.4% of the combined county land area in the state.
See the complete Louisiana ranking · What counts as a county equivalent?
Population and density of Tensas Parish
The Census Bureau estimates that 3,700 people lived in Tensas Parish on July 1, 2025. That ranks #2,982 of 3,222 county equivalents nationally and #64 of 64 in Louisiana. Since the April 1, 2020 estimates base of 4,148, the population has declined by 448 (−10.8%), compared with −0.9% for Louisiana as a whole.
With 603.3 square miles of land, that is 6.1 people per square mile (2.4 per km²), placing Tensas Parish #2,800 nationally for density and #63 in Louisiana. The median county equivalent has 47 people per square mile; the Louisiana median is 48. Put another way, there are about 104 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 4,107 | 4,028 | 3,848 | 3,843 | 3,818 | 3,700 |
| Change | — | −79 | −180 | −5 | −25 | −118 |
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 Tensas Parish
3 incorporated places lie at least partly in Tensas Parish. Together they are home to 2,034 people (55%); the other 1,666 (45%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Newellton town, with 799 residents in the county. The county seat, St. Joseph town, has 746 residents. By land, St. Joseph town is the largest at 0.89 mi².
| Incorporated place | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Newellton town | 799 | −11% | 0.759 |
| St. Joseph townCounty seat | 746 | −10.6% | 0.89 |
| Waterproof town | 489 | −11.7% | 0.697 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Tensas Parish. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.
Metropolitan area
Tensas Parish is not part of any metropolitan or micropolitan statistical area in the Office of Management and Budget’s July 2023 delineation; 1,306 other county equivalents are also outside one. These areas are built around an urban core of at least 10,000 people plus the counties tied to it by commuting, so counties outside them are generally rural.
ZIP codes
4 ZIP Code Tabulation Areas have land in Tensas Parish; 3 of them have most of their land inside the county, and the others mainly cover neighboring areas.
71282713577136671375
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 Tensas Parish
Tensas Parish shares a land border with 8 county equivalents, including 4 in Mississippi. It has more land than 4 of them. The largest neighbor is Catahoula Parish (709.3 mi²) and the smallest is Adams County (462.3 mi²). Together with its neighbors, Tensas Parish forms a block of 5,314.7 mi² of land, of which it holds 11.4%.
| Bordering county equivalent | Land mi² | Size vs. Tensas | Compare |
|---|---|---|---|
| Catahoula Parish | 709.3 | 1.2× larger | Compare |
| Concordia Parish | 695.7 | 1.2× larger | Compare |
| Franklin Parish | 624.3 | about the same | Compare |
| Madison Parish | 623.9 | about the same | Compare |
| Warren CountyMississippi | 588.5 | about the same | Compare |
| Jefferson CountyMississippi | 519.9 | 1.2× smaller | Compare |
| Claiborne CountyMississippi | 487.4 | 1.2× smaller | Compare |
| Adams CountyMississippi | 462.3 | 1.3× smaller | Compare |
How big is Tensas Parish compared with U.S. states?
Tensas Parish has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.7 times as much. Louisiana’s county land could hold about 72 areas the size of Tensas Parish.
Another way to picture it: the same land area would fill a square about 24.6 miles (39.5 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 Tensas Parish?
Tensas Parish has more land than 1,605 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 Tensas Parish at #1,604 nationally by total area, 13 places closer to the top than its land rank. The water assigned to this geography moves it ahead of some county equivalents with more land.
Its water share is 6%, compared with a national county-equivalent median of 1.2% — 4.8 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 Tensas Parish in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #1616 | McHenry County, Illinois | 603.4 | Compare |
| #1617 | Tensas Parish, Louisiana | 603.3 | This county |
| #1618 | Gibson County, Tennessee | 602.7 | 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 32.001489, -91.342576. 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: 1,562,545,680 m²; AWATER: 99,432,220 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 Tensas Parish?
Tensas Parish, Louisiana has 603.3 square miles (1,562.5 km²) of land and 38.4 square miles of water, for a total area of 641.7 square miles. It ranks #1617 of 3,222 U.S. county equivalents by land area.
Is Tensas Parish the largest county in Louisiana?
No. Tensas Parish ranks #39 of 64 in Louisiana by land area. The largest is Vernon Parish, with 1,326.7 square miles of land.
What counties border Tensas Parish?
Tensas Parish shares a land border with Madison Parish, Franklin Parish, Claiborne County, Mississippi, Warren County, Mississippi, Jefferson County, Mississippi, Concordia Parish, Catahoula Parish, and Adams County, Mississippi.
What is the population of Tensas Parish?
The Census Bureau estimates Tensas Parish had 3,700 residents on July 1, 2025, ranking #2,982 of 3,222 county equivalents. That is 6.1 people per square mile of land.
What is the county seat of Tensas Parish?
The county seat of Tensas Parish is St. Joseph.
What cities and towns are in Tensas Parish?
Tensas Parish has 3 incorporated places. The most populous are Newellton town, St. Joseph town, and Waterproof town; 1,666 residents live outside any incorporated place.
Is Tensas Parish part of a metropolitan area?
No. Tensas Parish is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.
How many ZIP codes are in Tensas Parish?
4 ZIP Code Tabulation Areas have land in Tensas Parish, and 3 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Tensas Parish compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 1.7 times as much land.
How many acres of land are in Tensas Parish?
The land measurement converts to approximately 386,113 acres. Including water, total area is approximately 410,684 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.