How many people live in ?

Updated annually
In 2025, there were 1.06 million people living in Delaware. That makes Delaware the 45th-most populous state, home to 0.31% of people living in the US.

1.06M

population of Delaware (2025)

0.31%

Delaware share of the US population (2025)
The population of Delaware was about 5.7 times higher than it was in 1900. Between 2024 and 2025, the population of Delaware grew by about 9,800 people.

About 1.06 million people lived in Delaware in 2025. That's about 5.7 times more than in 1900.

Annual population estimates

What are Delaware's age demographics?

About 229,000 Delaware residents were aged 65 and older in 2024. That represents 21.8% of the state’s population compared with 18% in the US overall.
Another 213,700 Delaware residents, or 20.4% of the state’s population, were aged under 18. For comparison, children account for 21.6% of the US population.

A higher share of Delaware's population is is 65 and older than the US overall.

Population share by age group (2024)

What are Delaware's racial and ethnic demographics?

A state’s population may have racial and ethnic differences compared with the US overall. These figures reflect how people identified their race alone (not in combination with other races), and separate Hispanic or Latino ethnicity, following Census Bureau reporting standards.
Non-Hispanic white residents make up 58.1% of Delaware’s population, higher than the national share of 57.5%. Delaware also has a larger share of people identifying as non-Hispanic Black or African American (22.7%) than the US overall (12.6%).
In contrast, Delaware’s Hispanic population accounted for 11.7%, below the 20% share nationwide. The non-Hispanic Asian population makes up 4.7% of the state, compared with 6.5% nationally.

A higher share of Delaware's population is is non-Hispanic Black or African American than the US overall.

Population share by race and ethnicity (2024)

What are Delaware's most populous counties?

In 2024, one out of three counties accounted for over half of Delaware’s population:
  • New Castle County, 588,100 (56% of the population)

In 2024, New Castle County was the most populous county in Delaware.

Population estimates

What are Delaware's most populous cities?

The largest city in Delaware is Wilmington with about 73,200 residents in 2024.

Cities and counties in Delaware ranked by population

Cities and counties in Delaware ranked by population
1.

Wilmington 

73,176
2.

Dover 

40,191
3.

Newark 

30,506
4.

Middletown 

25,686
5.

Milford 

14,079
6.

Smyrna 

13,326
7.

Seaford 

8,952
8.

Georgetown 

8,098
9.

Millsboro 

7,864
10.

Elsmere 

6,234

Keep exploring

Methodology

USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.

The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.

Page sources

USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.