Population

Is population growing or shrinking?

Updated annually
It grew by 5,800 between 2023 and 2024. Changes in population can reflect birth and death rates, immigration patterns, regional shifts, and even the overall health of the economy. The 0.99% annual increase was primarily driven by immigration to the state.
In the decade between 2014 and 2024, New Castle County, DE’s population grew by 6.7%.

+5.77K

population change (2023 to 2024)

+0.99%

percent change in population (2023 to 2024)
Since 2000, New Castle County, DE’s population increased 24 out of 24 years. The largest increase occurred between 2019 and 2020, when New Castle County, DE gained 11,000 residents. Its smallest increase occurred between 2016 and 2017 when there were 909 more residents.

New Castle County, DE gained 5,800 residents between 2023 and 2024.

Annual population change

A county’s population is influenced by three factors:
  • Natural population change: If births outnumber deaths in a given year, natural population growth is positive. If deaths exceed births, it is negative. Between 2023 and 2024 natural population change was positive in New Castle County, DE, with births exceeding deaths by 634.
  • Immigration: international migration directly into or out of a county: If more people move in than move out, population change from immigration is positive. If more people move out than move in, it’s negative. Between 2023 to 2024, New Castle County, DE’s population change from immigration was positive with about 5,200 more people coming from another country directly to New Castle County, DE than leaving.
  • Domestic migration, moving between counties: Between 2023 to 2024, New Castle County, DE’s population change from domestic migration was negative with about 90 more people moving to any other county in the US.

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Between 2023 and 2024, immigration was the primary driver of population growth in New Castle County, DE.

Components of population change

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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.