How many people live in Lamar County, MS?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 66,700 people living in Lamar County, MS. That makes Lamar County the 10th-most populous county in Mississippi. It is home to 2.3% of people living in the state.
66.7K
population of Lamar County, MS (2024)
2.3%
County share of the Mississippi population (2024)
About 66,700 people lived in Lamar County, MS in 2024.
Population estimates, 2000–2024
What are Lamar County, MS’s age demographics?
About 10,900 Lamar County residents are aged 65 and older in 2024. That represents 16.3% of its population. For comparison, the age group represents 18% of Mississippi’s population and 18% in the US overall.
Another 15,800 Lamar County residents, or 23.7% of the population, were children under 18. For comparison, the age group represents 23% of Mississippi’s population and 21.6% in the US overall.
A higher share of Lamar County, MS's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are Lamar County, MS’s racial and ethnic demographics?
Non-Hispanic white residents make up 70.2% of the Lamar County, MS population, higher than the national share of 57.5%. Lamar County, MS also has a larger share of people identifying as non-Hispanic Black or African American (22.9%) than the US overall (12.6%).
In contrast, Lamar County’s Hispanic population accounts for 3.7%, below the 20% nationwide, and the non-Hispanic Asian population makes up 1.5% of the county, 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.
Lamar County, MS has a higher share of a non-Hispanic white population than Mississippi as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Lamar County, MS is Hattiesburg with about 6,800 residents in 2024.
Cities and towns in Lamar County, MS ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Hattiesburg (pt.) | 6,760 |
| 2. | Sumrall | 2,172 |
| 3. | Purvis | 1,955 |
| 4. | Lumberton (pt.) | 1,636 |
| 5. | Balance of Lamar County | 54,211 |
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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.
