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Zip Code 19966 — Millsboro, DE

19966 is a ZIP Code associated with Millsboro, DE, located within Sussex. The postal region supports an estimated population of 35,884 residents across Data Pending housing units, with a population density of 155.5 people per square mile.

WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (38.581180, -75.282740)

Data Metric	Local Statistic
Postal / Zip Code	19966
Primary City	Millsboro
State / Province	DE
County	Sussex
Total Population	35,884
Median Household Income	Data Pending
Total Housing Units	Data Pending
Population Density	155.5 people/sq mi
Timezone	America/New_York

How 19966 Compares

Metric	ZIP 19966	Sussex County	DE State Average
Population	35,884	267,041	1,021,605
Median Income	Data Pending	N/A	N/A
Population Density	155.5 /sq mi	--	--

Nearby ZIP Codes

ZIP Code	City	Distance	Population	Median Income
Zip 19939	Dagsboro	4.5 mi	7,490	N/A
Zip 19945	Frankford	6.1 mi	9,640	N/A
Zip 19951	Harbeson	7.5 mi	2,245	N/A
Zip 19947	Georgetown	9.0 mi	20,760	N/A
Zip 19967	Millville	9.2 mi	2,376	N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →