How many people live in Owyhee County, ID?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 12,700 people living in Owyhee County, ID. That makes Owyhee County the 28th-most populous county in Idaho. It is home to 0.63% of people living in the state.
12.7K
population of Owyhee County, ID (2024)
0.63%
County share of the Idaho population (2024)
About 12,700 people lived in Owyhee County, ID in 2024.
Population estimates, 2000–2024
What are Owyhee County, ID’s age demographics?
About 2,500 Owyhee County residents are aged 65 and older in 2024. That represents 19.9% of its population. For comparison, the age group represents 17.7% of Idaho’s population and 18% in the US overall.
Another 2,900 Owyhee County residents, or 23% of the population, were children under 18. For comparison, the age group represents 23.4% of Idaho’s population and 21.6% in the US overall.
A lower share of Owyhee County, ID's population is aged 25–44 than the US as a whole.
Population estimates by age group, (2024)
What are Owyhee County, ID’s racial and ethnic demographics?
Non-Hispanic white residents make up 69.9% of the Owyhee County, ID population, higher than the national share of 57.5%. Owyhee County, ID also has a larger share of people identifying as Hispanic (24.9%) than the US overall (20%).
In contrast, Owyhee County’s non-Hispanic Black or African American population accounts for 0.57%, below the 12.6% nationwide, and the non-Hispanic Asian population makes up 0.57% 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.
Owyhee County, ID has a higher share of a Hispanic population than Idaho as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Owyhee County, ID is Homedale with about 3,100 residents in 2024.
Cities and towns in Owyhee County, ID ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Homedale | 3,147 |
| 2. | Marsing | 1,245 |
| 3. | Grand View | 464 |
| 4. | Balance of Owyhee County | 7,892 |
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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.
