Overview
17,465
Total Population
40.5
Median age
50.04%
Female population %
99.9:100
Gender ratio (M:F)
20-24 years
Largest age group
53.7
Total dependency ratio
White
Largest racial group
284
Hispanic population
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
New Castle's population is old compared to the rest of the country:
- The median age in New Castle is 40.5, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
- New Castle's population under 18 was 22.16%, compared to the 22.51% nationwide.
- New Castle's elderly or the senior population (over 65 age) was 17.15% as compared to 16.04% nationwide.
- Of the total population in New Castle, 17.78% were under the age of 15, 20.76% aged 15 to 29, 44.30% aged 30 to 64, 15.13% aged 65 to 84, and 2.03% were 85 years of age and older.

Read more about New Castle, IN population by age ➔
Gender
There are 13 more females than males in New Castle:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 50.04% females and 49.96% males in New Castle, IN.
- The New Castle, IN gender ratio is 99.9:100 i.e. 99.9 men to 100 women (0.999).
- For male population, the largest age group is 5-9 years with a population of 710.
- For the female population, the largest age group is 50-54 years with a population of 698.

Read more about New Castle, IN population by gender ➔
Race / Ethnicity
New Castle's population has become increasingly diverse:
- Racial distribution of New Castle population: 92.80% are White, 2.87% are Black or African American, 0.01% are American Indian and Alaska Native, 0.53% are Asian, 0.72% are some other race and 3.08% are multiracial.
- New Castle's racial breakdown clearly shows that there is an absolute majority of White population in the city.
- By ethnicity, 284 is Hispanic or Latino (of any race), and 17,181 (98.37% of the total population) is Non-Hispanic.
- The largest racial group in New Castle is White with a population of 16,207 (92.80% of the total population).

Read more about New Castle, IN population by race ➔
Year by year
New Castle's population has already reached its peak and is showing a trend of decline:
- The peak population was 19,255 in the year 2000
- From 2000 to 2010, New Castle's population decreased by 1,130 (5.87%), as compared to the national growth of 9.63%.
- From 2010 to 2020, New Castle's population decreased by 727 (4.01%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
- Between the year 2000 and 2022, New Castle's population was lowest in year 2019 at 17,139.

Read more about New Castle, IN population by year ➔
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates
- U.S. Census Bureau Population Estimates Population Estimates Program (PEP)