Australian Population in New Castle County, DE by City : 2025 Ranking & Insights

The Australian population in New Castle County, DE is recorded at 91, with Newark (14) and Wilmington (10) leading among the few incorporated cities reporting measurable presence. The remaining difference likely reflects residents living in unincorporated areas or smaller cities not included in this analysis. Below, we explore how the Australian population is distributed across New Castle County.

Top 5 cities with the largest Australian population in New Castle County

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  • 1
    Newark
    Australian population in Newark is 14
    0.05% of Newark population is Australian
  • 2
    Wilmington
    Australian population in Wilmington is 10
    0.01% of Wilmington population is Australian
  • 3
    Bellefonte
    Australian population in Bellefonte is 0
    - of Bellefonte population is Australian
  • 4
    Delaware City
    Australian population in Delaware City is 0
    - of Delaware City population is Australian
  • 5
    Elsmere
    Australian population in Elsmere is 0
    - of Elsmere population is Australian

Overview of Australian population in New Castle County

  • Population Count and Percentage: American Community Survey data document New Castle County with 91 Australian residents (0.016% of 573,030 total county population), positioning the jurisdiction at the 92nd percentile nationally among counties and 66th percentile within Delaware for Australian population concentrations, despite absolute population figures.
  • Comparison to State and National Averages: Census Bureau's ACS indicate New Castle County's Australian population of 0.016% exceeds Delaware's state average of 0.014% while remaining below the national average of 0.029%, placing the county above regional demographic benchmarks while below national concentration levels.
  • Share of Total State Population: Official American Community Survey data indicates New Castle County hosts 91 Australian residents, constituting 65% of Delaware's total Australian population of 140, creating a demographic concentration where more than half of the state's Australian community resides within a single county—a geographic clustering pattern rarely documented in American demographic research.
  • Population Density per Square Mile: U.S. Census Bureau's American Community Survey indicate New Castle County's density of 0.21 Australian Americans per square mile exceeds Delaware's average of 0.072 per square mile by nearly triple, establishing the county as a significant concentration center for Australian demographic communities.
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9 Cities in New Castle County Ranked by Australian Population

View Methodology
American Community Survey data [1] show Australian populations in two incorporated cities: Newark ( rank_1_geo_dempop residents) and rank_2_geo_name ( rank_2_geo_dempop residents). The table below provides additional context, including total population, population density, and demographic distributions, based on the current ACS data for incorporated cities included in this analysis*.
cities in New Castle County, DE ranked by Australian population count
Rank by Australian Population
City
Australian Population
% of Total City Population
% of Total New Castle County Australian Population
5 Year Rank Trend
1 Newark 14 0.05% 15.38%
2 Wilmington 10 0.01% 10.99%
3 Bellefonte 0 - -
3 Delaware City 0 - -
3 Elsmere 0 - -
3 Middletown 0 - -
3 New Castle 0 - -
3 0 - -
3 0 - -
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Methodology

This ranking list is based on data from the American Community Survey (ACS) 5-Year Estimates, conducted by the U.S. Census Bureau. The ACS is one of the most reliable sources for understanding population trends across different locations, and it provides estimates for various racial and ethnic groups at city, county, state and all geography levels down to the Census block group.
This list ranks city in New Castle County, DE by their Australian population, using the most recent ACS data available.

How the Census defines Australian population

The U.S. Census Bureau allows people to self-identify their ancestry, meaning individuals can write upto ancestries when responding to the survey. In this ranking, we include everyone who identifies as having Australian ancestry, whether alone or in combination with another ancestry.
Here are a few important things to know about how ancestry is reported:
  • Some people identify as Australian alone, while others identify as Australian along with another race (such as Australian and German).
  • We’ve used the “Australian alone or in any combination” category unless noted otherwise, which gives a broader picture of the Australian population in each area.

How We Ranked the Data

This ranking is based on the total number of people who identified as Australian alone or in combination in city. To provide additional context, we’ve also included two key percentages:
  1. % of Total City Population – This shows what percentage of the total state population identifies as Australian .
  2. % of Total New Castle County Australian Population – This tells us how much of the entire U.S. Australian population lives in that state.
To keep things simple, all population numbers have been rounded to the nearest whole number, and percentages are rounded to one decimal place. Because of rounding, some percentages may not add up to exactly 100%.

Things to Keep in Mind

Like all survey-based data, ACS estimates come with some limitations. Here are a few things to be aware of:
  • In places with very small Australian populations, the numbers may not be reported at all due to privacy protections or sampling variability in the survey.
  • Since the ACS is based on a sample, the numbers are estimates, not exact counts. That means they may slightly differ from other sources like the decennial U.S. Census.
  • City that don’t have any reported Australian population are not included in the ranking but are listed separately below for reference.
This ranking is meant to provide a clear, data-driven look at where Australian populations are most concentrated while keeping the numbers easy to understand.

Sources

  1. 2019-2023 5-Year Estimates.
  2. 2023.