About Hillsborough County
Hillsborough County is a city located in United States, in the New Hampshire region. According to the latest available data (2026), the population of Hillsborough County is approximately 422,937 residents, making it the #178 most populous city in United States.
Globally, Hillsborough County ranks #4,370 among the world's most populated cities.
Hillsborough County City Statistics
| City | Hillsborough County |
| Country |  United States |
| Population | 422,937 |
| Global Rank | #4,370 |
| Rank in United States | #178 of 867 cities |
| City Category | city |
| Region | New Hampshire |
| Latitude | 42.8956 |
| Longitude | -71.5827 |
| Data Year | 2026 |
Where is Hillsborough County Located?
Hillsborough County is located in United States, in the New Hampshire region, at coordinates 42.8956° latitude and -71.5827° longitude. Located in the mid-latitudes, Hillsborough County experiences distinct four-season weather patterns.
Nearby Cities
Other Cities in United States
Largest Cities in United States
| # | City | Population |
|---|---|---|
| 1 | Harris County | 4,731,145 |
| 2 | Los Angeles | 3,898,747 |
| 3 | San Diego County | 3,298,634 |
| 4 | Brooklyn | 2,736,074 |
| 5 | Miami-Dade County | 2,701,767 |
Frequently Asked Questions
What is the population of Hillsborough County?
The population of Hillsborough County is approximately 422,937 residents according to the latest available data (2026).
Where is Hillsborough County located?
Hillsborough County is located in United States at approximately 42.8956° latitude and -71.5827° longitude.
Is Hillsborough County one of the largest cities in United States?
With a population of 422,937, Hillsborough County is one of the notable urban areas in United States. It ranks #178 out of 867 cities in the country.
