How many people live in Mono County, CA?
Refreshed annually
In 2025, there were about 12,500 people living in Mono County, CA. That makes Mono County the 55th-most populous county in California. It is home to 0.03% of people living in the state.
12.5K
population of Mono County, CA (2025)
0.03%
County share of the California population (2025)
About 12,500 people lived in Mono County, CA in 2025.
Population estimates, 2000–2025
What are Mono County, CA's age demographics?
About 2,600 Mono County residents are aged 65 and older in 2024. That represents 19.9% of its population. For comparison, the age group represents 16.6% of California’s population and 18% in the US overall.
Another 2,300 Mono County residents, or 17.4% of the population, were children under 18. For comparison, the age group represents 21.4% of California’s population and 21.6% in the US overall.
A lower share of Mono County, CA's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are Mono County, CA's racial and ethnic demographics?
Non-Hispanic white residents make up 64.3% of the Mono County, CA population, higher than the national share of 57.5%. Mono County, CA also has a larger share of people identifying as Hispanic (28.3%) than the US overall (20%).
In contrast, Mono County’s non-Hispanic Black or African American population accounts for 0.89%, below the 12.6% nationwide, and the non-Hispanic Asian population makes up 2% 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.
Mono County, CA has a higher share of a non-Hispanic white population than California as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Mono County, CA is Mammoth Lakes with about 7,100 residents in 2024.
Cities and towns in Mono County, CA ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Mammoth Lakes | 7,124 |
| 2. | Balance of Mono County | 5,867 |
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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.
