LaSalle Parish area

Population and density of LaSalle Parish

The Census Bureau estimates that 15,154 people lived in LaSalle Parish on July 1, 2025. That ranks #2,154 of 3,222 county equivalents nationally and #51 of 64 in Louisiana. Since the April 1, 2020 estimates base of 14,798, the population has grown by 356 (+2.4%), compared with −0.9% for Louisiana as a whole.

With 624.9 square miles of land, that is 24 people per square mile (9.4 per km²), placing LaSalle Parish #2,163 nationally for density and #53 in Louisiana. The median county equivalent has 47 people per square mile; the Louisiana median is 48. Put another way, there are about 26 acres of land per resident.

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 LaSalle Parish

4 incorporated places lie at least partly in LaSalle Parish. Together they are home to 7,019 people (46.3%); the other 8,135 (53.7%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Jena town, with 4,229 residents in the county. Among places with at least 1,000 residents in 2020, Olla town grew fastest since then (+2.4%).

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside LaSalle Parish. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.

Metropolitan area

LaSalle 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

8 ZIP Code Tabulation Areas have land in LaSalle Parish; 4 of them have most of their land inside the county, and the others mainly cover neighboring areas.

7134271343713717143571441714657147971480

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 LaSalle Parish

LaSalle Parish shares a land border with 6 county equivalents. It has more land than 1 of them. The largest neighbor is Rapides Parish (1,324.1 mi²) and the smallest is Caldwell Parish (529.8 mi²). Together with its neighbors, LaSalle Parish forms a block of 5,613.1 mi² of land, of which it holds 11.1%.

How big is LaSalle Parish compared with U.S. states?

LaSalle 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 69 areas the size of LaSalle Parish.

Another way to picture it: the same land area would fill a square about 25 miles (40.2 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 LaSalle Parish?

LaSalle Parish has more land than 1,681 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 LaSalle Parish at #1,533 nationally by total area, 8 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 5.7%, compared with a national county-equivalent median of 1.2% — 4.5 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 LaSalle Parish in the national ranking. They can be in different states and are not necessarily geographic neighbors.

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.