St. Helena Parish area

Population and density of St. Helena Parish

The Census Bureau estimates that 10,758 people lived in St. Helena Parish on July 1, 2025. That ranks #2,433 of 3,222 county equivalents nationally and #56 of 64 in Louisiana. Since the April 1, 2020 estimates base of 10,908, the population has declined by 150 (−1.4%), compared with −0.9% for Louisiana as a whole.

With 408.5 square miles of land, that is 26 people per square mile (10 per km²), placing St. Helena Parish #2,109 nationally for density and #49 in Louisiana. The median county equivalent has 47 people per square mile; the Louisiana median is 48. Put another way, there are about 24 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 St. Helena Parish

2 incorporated places lie at least partly in St. Helena Parish. Together they are home to 813 people (7.6%); the other 9,945 (92.4%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Greensburg town, with 615 residents in the county.

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

Metropolitan area

St. Helena Parish is an outlying county of the Baton Rouge, LA Metropolitan Statistical Area. Its 10 county equivalents have 888,699 residents on 4,367.8 square miles of land; St. Helena Parish accounts for 9.4% of the land and 1.2% of the residents. By combined land it ranks #61 of 393 metropolitan areas, and #68 by population. It belongs to the Baton Rouge-Hammond, LA Combined Statistical Area.

ZIP codes

7 ZIP Code Tabulation Areas have land in St. Helena Parish; 2 of them have most of their land inside the county, and the others mainly cover neighboring areas.

70422704417044370444704537070670744

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 St. Helena Parish

St. Helena Parish shares a land border with 5 county equivalents, including 1 in Mississippi. Each of them has more land than St. Helena Parish. The largest neighbor is Tangipahoa Parish (791.2 mi²) and the smallest is East Feliciana Parish (453.3 mi²). Together with its neighbors, St. Helena Parish forms a block of 3,486.7 mi² of land, of which it holds 11.7%.

How big is St. Helena Parish compared with U.S. states?

St. Helena Parish has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 2.5 times as much. Louisiana’s county land could hold about 106 areas the size of St. Helena Parish.

Another way to picture it: the same land area would fill a square about 20.2 miles (32.5 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 St. Helena Parish?

St. Helena Parish has more land than 750 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 St. Helena Parish at #2,548 nationally by total area, 76 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 0.3%, compared with a national county-equivalent median of 1.2% — 0.9 percentage points lower. 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 St. Helena 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.