10 Most Populated ZIP Codes in Delaware

The top ZIP code for population in Delaware is 19720 (Historic New Castle, New Castle County), with a population of 60,593. Across the top 10 most populated ZIP codes in Delaware, population ranges from 60,593 to 34,892, covering communities from Historic New Castle to Bear.

Rank	ZIP	City	County	Population	Population
1	19720	Historic New Castle	New Castle County	60,593	60,593
2	19702	Bear	New Castle County	56,049	56,049
3	19709	Middletown	New Castle County	50,542	50,542
4	19711	Newark	New Castle County	49,113	49,113
5	19701	Bear	New Castle County	44,801	44,801
6	19805	Wilmington	New Castle County	40,315	40,315
7	19901	Dover	Kent County	39,149	39,149
8	19808	Wilmington	New Castle County	38,334	38,334
9	19904	Dover	Kent County	38,125	38,125
10	19966	Millsboro	Sussex County	34,892	34,892

Methodology

Rankings are derived from the U.S. Census Bureau American Community Survey 5-Year Estimates, vintage 2019 to 2023, joined to USPS ZIP Code Tabulation Areas. We rank by population and surface the top 10 ZIP codes within Delaware. Values reflect ZCTA-level estimates and may differ slightly from city-level figures. Compiled and reviewed by the Zip Code Near Me Data Team.

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Reviewed by Zip Code Near Me Data Team. Last verified June 13, 2026.

10 Most Populated ZIP Codes in Delaware

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