How many people live in Natrona County, WY?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 80,400 people living in Natrona County, WY. That makes Natrona County the second-most populous county in Wyoming. It is home to 13.7% of people living in the state.
80.4K
population of Natrona County, WY (2024)
13.7%
County share of the Wyoming population (2024)
About 80,400 people lived in Natrona County, WY in 2024.
Population estimates, 2000–2024
What are Natrona County, WY’s age demographics?
About 14,700 Natrona County, WY residents are aged 65 and older in 2024. That represents 18.3% of its population. For comparison, the age group represents 19.8% of Wyoming’s population and 18% in the US overall.
Another 18,400 Natrona County residents, or 22.9% of the population, were children under 18. For comparison, the age group represents 21.9% of Wyoming’s population and 21.6% in the US overall.
A higher share of Natrona County, WY's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are Natrona County, WY’s racial and ethnic demographics?
Non-Hispanic white residents make up 85.1% of the Natrona County, WY population, higher than the national share of 57.5%. Natrona County also has a larger share of people identifying as non-Hispanic American Indian and Alaska Native (1%) than the US overall (0.72%).
In contrast, Natrona County’s non-Hispanic Black or African American population accounts for 1%, below the 12.6% nationwide, and the Hispanic population makes up 9.9% of the county, compared with 20% 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.
Natrona County, WY has a higher share of a non-Hispanic white population than Wyoming as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Natrona County, WY is Casper with about 58,800 residents in 2024.
Cities and towns in Natrona County, WY ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Casper | 58,823 |
| 2. | Mills | 4,584 |
| 3. | Bar Nunn | 3,019 |
| 4. | Evansville | 2,837 |
| 5. | Midwest | 291 |
| 6. | Edgerton | 155 |
| 7. | Balance of Natrona County | 10,701 |
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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.
