New Castle Population

1850–2026

17,386

2026 projection

0.1% since 2020 (decrease)

05K10K15K20K25K186018801900192019401960198020002020

Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for New Castle. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202617,386-40.02%
202517,390+110.06%
202417,379+170.10%
202317,362+470.27%
202217,315-1060.61%
202117,421+250.14%
202017,396-170.10%
201917,413-910.52%
201817,504-60.03%
201717,510-360.21%

Showing 10 of 33 years.

The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.

Growth since 2020, compared

New Castle has a population change lower than Henry County, Indiana, and the U.S.

  • United States+3.1%
  • Indiana+2.7%
  • Henry County+0.5%
  • New Castle0.0%

Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.

Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.

New Castle Demographics

41.2median age

Median age

Female42.5 yrs
Male40.1 yrs

Adults

13,745
2,942 seniors (65+) · 21% of adults10,803 other adults

Sex

Female 49.7% · 8,631Male 50.3% · 8,736

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 174 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

New Castle Income

$51,606median household income

Median household income

$51,606

Half of households earn more, half earn less

Median earnings

$41,045

Typical yearly pay for a worker 25 or older.

Poverty rate

20.1%

About 1 in 5 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

New Castle Marital Status

37% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married37%37%36%
Never married35%41%29%
Divorced17%14%19%
Widowed8%4%13%
Separated3%3%3%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201