How many people live in Yuma County, AZ?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 220,300 people living in Yuma County, AZ. That makes Yuma County the sixth-most populous county in Arizona. It is home to 2.9% of people living in the state.
220K
population of Yuma County, AZ (2024)
2.9%
County share of the Arizona population (2024)
About 220,300 people lived in Yuma County, AZ in 2024.
Population estimates, 2000–2024
What are Yuma County, AZ’s age demographics?
About 46,900 Yuma County residents are aged 65 and older in 2024. That represents 21.3% of its population. For comparison, the age group represents 19.7% of Arizona’s population and 18% in the US overall.
Another 52,800 Yuma County, AZ residents, or 24% of the population, were children under 18. For comparison, the age group represents 21% of Arizona’s population and 21.6% in the US overall.
A lower share of Yuma County, AZ's population is aged 45–64 than the US as a whole.
Population estimates by age group, (2024)
What are Yuma County, AZ’s racial and ethnic demographics?
Hispanic residents make up 66.1% of the Yuma County, AZ population, higher than the national share of 20%. Yuma County, AZ also has a larger share of people identifying as non-Hispanic American Indian and Alaska Native (0.97%) than the US overall (0.72%).
In contrast, Yuma County’s non-Hispanic white population accounts for 28.5%, below the 57.5% nationwide, and the non-Hispanic Black or African American population makes up 1.8% of the county, compared with 12.6% 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.
Yuma County, AZ has a higher share of a Hispanic population than Arizona as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Yuma County, AZ is Yuma with about 103,600 residents in 2024.
Cities and towns in Yuma County, AZ ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Yuma | 103,559 |
| 2. | San Luis | 40,064 |
| 3. | Somerton | 14,902 |
| 4. | Wellton | 2,648 |
| 5. | Balance of Yuma County | 59,137 |
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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.
