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

There are 31 cities in New Castle County, Delaware.

Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Wilmington1Delaware72,29170,8470.5%6,63510.89
Newark2Delaware30,30530,601-0.24%3,1999.47
Middletown3Delaware26,01823,3782.6%2,05212.68
Bear4Delaware24,74321,3973.5%4,2785.78
Glasgow5Delaware15,41115,3990.02%1,5539.93
Brookside6Delaware14,58913,7410.89%3,7583.88
Smyrna7Delaware13,63512,9531.27%2,1276.41
Hockessin8Delaware13,58414,172-1.07%1,35310.04
Pike Creek Valley9Delaware11,55811,3460.46%4,0262.87
Claymont10Delaware11,0399,3433.99%5,1322.15
North Star11Delaware9,0927,5464.13%1,3376.80
Wilmington Manor12Delaware8,1858,335-0.45%5,0091.63
Pike Creek13Delaware6,9636,987-0.09%2,5892.69
Edgemoor14Delaware6,4876,4830.01%3,3821.92
Elsmere15Delaware6,0996,221-0.49%6,1790.99
New Castle16Delaware5,5165,550-0.14%1,5863.48
Clayton17Delaware4,4633,9912.72%2,2911.95
Greenville18Delaware2,9462,4482.11%1,0542.80
Townsend19Delaware2,8722,7461.13%2,7091.06
Delaware City20Delaware1,9031,8850.26%1,0231.86
St. Georges21Delaware1,5181,0457.58%1,1011.38
Bellefonte22Delaware1,2291,2250.08%6,9440.18
Newport23Delaware885905-0.56%1,8950.47
Cecilton24Maryland6856730.44%1,4180.48
Arden25Delaware4304300%1,7270.25
Odessa26Delaware358366-0.56%7060.51
Ardentown27Delaware2562540.39%1,0940.23
Ardencroft28Delaware2302280.44%2,5840.09
Kenton29Delaware2272131.79%1,2900.18
Leipsic30Delaware1871811.08%6300.30
Port Penn31Delaware02930%00.40
showing: 31 rows

Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.

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?

Port Penn is the smallest city in New Castle County.

How many cities are in New Castle County?

There are 31 cities in New Castle County, Delaware.

Frequently Asked Questions