How many people live in Assumption Parish, LA?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 20,100 people living in Assumption Parish, LA. That makes Assumption Parish the 43rd-most populous parish in Louisiana. It is home to 0.43% of people living in the state.
20.1K
population of Assumption Parish, LA (2024)
0.43%
County share of the Louisiana population (2024)
About 20,100 people lived in Assumption Parish, LA in 2024.
Population estimates, 2000–2024
What are Assumption Parish, LA’s age demographics?
About 4,300 Assumption Parish, LA residents are aged 65 and older in 2024. That represents 21.5% of its population. For comparison, the age group represents 17.8% of Louisiana’s population and 18% in the US overall.
Another 4,000 Assumption Parish residents, or 19.7% of the population, were children under 18. For comparison, the age group represents 23.3% of Louisiana’s population and 21.6% in the US overall.
A higher share of Assumption Parish, LA's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are Assumption Parish, LA’s racial and ethnic demographics?
Non-Hispanic white residents make up 64.7% of the Assumption Parish, LA population, higher than the national share of 57.5%. Assumption Parish, LA also has a larger share of people identifying as non-Hispanic Black or African American (28.2%) than the US overall (12.6%).
In contrast, Assumption Parish’s Hispanic population accounts for 4.5%, below the 20% nationwide, and the non-Hispanic Asian population makes up 0.47% of the parish, compared with 6.5% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Assumption Parish, LA has a higher share of a non-Hispanic white population than Louisiana as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Assumption Parish, LA is Napoleonville with about 506 residents in 2024.
Cities and towns in Assumption Parish, LA ranked by population
Population (2024), includes only portions within parish
| City or town | Population | |
|---|---|---|
| 1. | Napoleonville | 506 |
| 2. | Balance of Assumption Parish | 19,544 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
