There are 26 cities in New Castle County, Delaware.

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City
Rank
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Wilmington173,06170,8471.03%6,70010.90
Newark230,32930,601-0.2%3,3009.19
Middletown325,57623,3781.75%2,16611.81
Bear423,07021,397 4,0395.71
Glasgow515,40515,399 1,5529.93
Brookside614,33113,741 3,6353.94
Hockessin713,87814,172 1,38210.04
Smyrna813,53412,9530.9%2,1556.28
Pike Creek Valley911,45211,346 4,4342.58
Claymont1010,1919,343 4,7402.15
North Star118,3707,546 1,2316.80
Wilmington Manor128,2608,335 5,1081.62
Pike Creek136,9756,987 2,5342.75
Edgemoor146,4856,483 3,4751.87
Elsmere156,1126,221-0.39%6,0761.01
New Castle165,5515,5500.16%1,6473.37
Clayton174,6653,9914.93%2,4441.91
Greenville182,8242,448 1,0292.75
Townsend192,8212,7460.21%2,6661.06
Delaware City201,9061,8850.32%1,0101.89
Bellefonte211,2291,2250.08%6,9440.18
Newport22889905-0.34%2,0300.44
Arden23430430 1,7130.25
Odessa24362366 7130.51
Ardentown252592540.78%1,1770.22
Ardencroft26229228 2,6020.09
showing: 26 rows

Cities in New Castle County, Delaware by Population (2024)

What is the largest city in New Castle County, Delaware?

Wilmington is the largest city in New Castle County.

What is the smallest city in New Castle County, Delaware?

Ardencroft is the smallest city in New Castle County.

How many cities are in New Castle County?

There are 26 cities in New Castle County, Delaware.

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