Colorado · United States
New Castle population
4,669people · latest figure
New Castle has a population of 4,669, making it the 5595th largest place we list in United States. It is in Colorado.
New Castle holds under a tenth of one per cent of United States's 349,035,494 people. New York City, the largest place we list there, is 1886 times its size.
4,669
population
#5,595
New Castle is in Colorado, which has 282 recorded places.
Nearby in size
| Place | Region | Population |
|---|---|---|
| Walnut Ridge | Arkansas | 4,673 |
| Michigan Center | Michigan | 4,672 |
| Carlyss | Louisiana | 4,670 |
| Baldwin City | Kansas | 4,669 |
| Granite Falls | North Carolina | 4,662 |
| Higginsville | Missouri | 4,662 |
All places in United States → · Colorado →
Figures are the latest available in GeoNames (CC BY 4.0), which draws on national censuses of varying dates — treat them as recent, not same-year. Country totals are UN World Population Prospects 2024 (medium variant) where the UN lists the country separately; the handful it reports under a parent state keep a GeoNames figure and are marked as such. Sources & method.