How many people live in Morris County, NJ?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 523,100 people living in Morris County, NJ. That makes Morris County the 10th-most populous county in New Jersey. It is home to 5.5% of people living in the state.
523K
population of Morris County, NJ (2024)
5.5%
County share of the New Jersey population (2024)
About 523,100 people lived in Morris County, NJ in 2024.
Population estimates, 2000–2024
What are Morris County, NJ’s age demographics?
About 100,200 Morris County residents are aged 65 and older in 2024. That represents 19.1% of its population. For comparison, the age group represents 18% of New Jersey’s population and 18% in the US overall.
Another 106,400 Morris County residents, or 20.4% of the population, were children under 18. For comparison, the age group represents 21.5% of New Jersey’s population and 21.6% in the US overall.
A higher share of Morris County, NJ's population is aged 45–64 than the US as a whole.
Population estimates by age group, (2024)
What are Morris County, NJ’s racial and ethnic demographics?
Non-Hispanic white residents make up 65.7% of the Morris County, NJ population, higher than the national share of 57.5%. Morris County, NJ also has a larger share of people identifying as non-Hispanic Asian (11.9%) than the US overall (6.5%).
In contrast, Morris County’s non-Hispanic Black or African American population accounts for 3.6%, below the 12.6% nationwide, and the Hispanic population makes up 16.9% 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.
Morris County, NJ has a higher share of a non-Hispanic white population than New Jersey as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Morris County, NJ is Parsippany-Troy Hills with about 56,700 residents in 2024.
Cities and towns in Morris County, NJ ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Parsippany-Troy Hills | 56,729 |
| 2. | Mount Olive | 29,499 |
| 3. | Rockaway | 26,893 |
| 4. | Randolph | 26,780 |
| 5. | Montville | 24,456 |
| 6. | Morris | 23,727 |
| 7. | Roxbury | 23,397 |
| 8. | Morristown | 20,732 |
| 9. | Jefferson | 20,705 |
| 10. | Dover | 18,909 |
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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.
