Last official estimated population of New Castle city (New Castle County**, Delaware state) was 5,379 (year 2014)[1]. This was 0.002% of total US population and 0.57% of total Delaware state population. Area of New Castle city is 3.5 mi² (=9.1 km²)[6], in this year population density was 1,526.82 p/mi². If population growth rate would be same as in period 2010-2014 (+0.44%/yr), New Castle city population in 2025 would be 5,646*.
Historical population of New Castle city for period 1850-2014:
Estimated population for 2014[1]. Click on flag to hide it.
Population • Legends • Position
[1850-1860] +4.7 %/yr
[1860-1870] +0.07 %/yr
[1870-1880] +6.8 %/yr
[1880-1890] +0.81 %/yr
[1890-1900] -1.69 %/yr
[1900-1910] -0.09 %/yr
[1910-1920] +1.41 %/yr
[1920-1930] +0.7 %/yr
[1930-1940] +0.66 %/yr
[1940-1950] +2.03 %/yr
[1950-1960] -1.87 %/yr
[1960-1970] +0.75 %/yr
[1970-1980] +0.19 %/yr
[1980-1990] -0.03 %/yr
[1990-2000] +0.12 %/yr
[2000-2005] +0.8 %/yr
[2005-2010] +0.51 %/yr
[2010-2014] +0.44 %/yr
• Wilmington city population
4.9 mi, 
21°
• Newark city
10.2 mi, 
273°
• Elsmere town
5 mi, 
342°
• Penns Grove borough
6.6 mi, 
52°
• Salem city
8.6 mi, 
144°
• Delaware City city
6.4 mi, 
193°
• Bellefonte town
7.6 mi, 
28°
• Newport town
3.7 mi, 
326°
• Arden village
10.6 mi, 22°
• Ardencroft village
10.3 mi, 24°
*Calculated by population.us from last known population growth rate, not official data.
**Some cities are placed on more than one county. Only 1 county is shown.
[1] Cities and Towns (Incorporated Places and Minor Civil Divisions) 2014, archived from the original, retrieved 02/23/2016
[2] City and Town Intercensal Estimates (2000-2010), archived from the original, retrieved 02/23/2016
[3] Places: 1990 and 1999 Populations, With Numeric and Percent Population Change, archived from the original, retrieved 02/23/2016
[4] Population of the 100 Largest Urban Places: 1980,
[5] Population of the 100 Largest Urban Places in history,
[6] Area, latitude longitude data, retrieved 02/23/2016
[7] Through the Decades, Overview 1790-2010, PDF, large files! >100 Mb
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