New Castle Population 2026
New Castle has a population of 17,621, making it the #2700 biggest city in 🇺🇸 United States, located in Indiana. It is about 500× smaller than New York City, the country's biggest city.
Population (city proper)
17,621
Rank in United States
#2700
Coordinates
39.93°N, 85.37°W
~324 m elevation · America/Indiana/Indianapolis
Distance to capital (Washington)
725 km
450 miles, straight line
Other big cities in Indiana
| City | Population | Rank in United States |
|---|---|---|
| Indianapolis | 887,642 | #16 |
| Fort Wayne | 260,326 | #81 |
| Evansville | 119,943 | #245 |
| South Bend | 101,516 | #317 |
| Carmel | 88,713 | #383 |
| Bloomington | 84,067 | #427 |
| Hammond | 77,614 | #474 |
| Gary | 77,156 | #476 |
Cities near New Castle
- Muncie70,087 people · ~29 km away
- Anderson55,305 people · ~33 km away
- Greenfield21,497 people · ~38 km away
- Richmond35,854 people · ~42 km away
- Fishers76,794 people · ~55 km away
- Noblesville59,093 people · ~56 km away
FAQ
What is the population of New Castle?
New Castle has a population of 17,621 (city proper, latest official figure via GeoNames), making it the #2700 biggest city in United States.
What state is New Castle in?
New Castle is located in Indiana, United States.
Is New Castle the capital of United States?
No, the capital of United States is Washington D.C., about 725 km away.
Sources & notes
Population refers to the city proper (municipal boundaries), not the metropolitan area. Source: GeoNames (CC BY 4.0), retrieved 2026-07-07. Country data: UN World Population Prospects 2024.
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