Zip Code 19966
Millsboro, Delaware — Sussex County
📍 ZIP code 19966 is in Millsboro, Sussex County, Delaware.
ZIP code 19966 is located in Millsboro, Sussex County, Delaware. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 34,892. The area code for ZIP code 19966 is 302.
Quick Answer
Zip code 19966 is in Millsboro, Delaware (Sussex County). It has a population of 34,892, median household income of $75,436, and median home value of $282,100.
Population
34,892
Income
$75,436
Home Value
$282,100
Climate
88°F / 29°F
About Zip Code 19966
Zip code 19966 is located in Millsboro, Delaware, within Sussex County. Home to approximately 34,892 residents, this area sits at an elevation of 21 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 302.
The median household income is $75,436 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $282,100, and the cost of living index is 91 (9% below the national average of 100).
Summers average a high of 88°F while winters drop to 29°F. The area receives about 44 in of rain and 11 in of snow annually. The zip code covers 86.6 square miles of land area and 8.3 square miles of water.
Key Statistics
34,892
$75,436
$282,100
Eastern (EST/EDT)
302
21 ft
86.6 sq mi
53
19,625
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Compare With Nearby Zip Codes
| Metric | 19966 | 19939 | 19945 | 19951 | 19967 | 19947 |
|---|---|---|---|---|---|---|
| City | Millsboro, DE | Dagsboro, DE | Frankford, DE | Georgetown, DE | Ocean View, DE | Georgetown, DE |
| Population | 34,892 | 7,833 | 8,917 | 1,957 | 2,093 | 19,343 |
| Median Income | $75,436 | $86,583 | $86,021 | $79,698 | $89,545 | $68,529 |
| Home Value | $282,100 | $365,100 | $410,000 | $427,900 | $450,100 | $294,000 |
| Cost of Living | 91 | 117 | 126 | 120 | 141 | 94 |
| Median Age | 53 | 55.5 | 58.7 | 58.6 | 65.4 | 37.1 |
Cost of Living
100 = National Average. Millsboro's cost of living is 9% below the national average.
vs. State Avg
Below
Affordability
Affordable
Income-to-Home
3.7x
Demographics
Zip code 19966 has a population of 34,892 people with a median age of 53. There are 19,625 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Millsboro (19966) population trend from 2010 to 2024
↑ 1174.8%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
88°F
29°F
44 in
11 in
Millsboro experiences warm summers with average highs around 88°F. Winters are cool with lows averaging 29°F. The area receives about 11 in of snow per year.
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Housing & Economy
Median Home Value
$282,100
Median Household Income
$75,436
With 19,625 housing units across 86.6 square miles, 19966 has a housing density of 227 units per square mile. The home price-to-income ratio is 3.7x.
Location & Geography
Latitude
38.5794°
Longitude
-75.2772°
Land Area
86.6 sq mi
Water Area
8.3 sq mi
Nearby Zip Codes
Zip codes closest to 19966 (Millsboro, DE) with distances:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 19966's $75,436. A way to compare Millsboro to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 19966 (Millsboro, DE). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Millsboro, Delaware?
Millsboro, Delaware uses zip code 19966.
What county is zip code 19966 in?
Zip code 19966 is located in Sussex County, Delaware.
What is the population of zip code 19966?
The population of zip code 19966 is 34,892 with a median age of 53.
Is 19966 in Millsboro, Delaware?
Yes, zip code 19966 is in Millsboro, Sussex County, Delaware. The area code is 302.
Frequently Asked Questions
What city is zip code 19966 in?
Zip code 19966 is in Millsboro, Delaware. It is part of Sussex County and uses the Eastern (EST/EDT) timezone.
What is zip code 19966?
Zip code 19966 is a U.S. postal code in Millsboro, Delaware (Sussex County). It has a population of 34,892 and covers 86.6 square miles.
What is the population of zip code 19966?
The population of zip code 19966 (Millsboro, DE) is 34,892 with a median age of 53. There are approximately 19,625 housing units in this area.
What is the median income in zip code 19966?
The median household income in zip code 19966 (Millsboro, DE) is $75,436 per year. The cost of living index is 91 (100 = national average).
What is the average home price in zip code 19966?
The median home value in zip code 19966 (Millsboro, DE) is $282,100. The cost of living index is 91 compared to the national average of 100.
What county is zip code 19966 in?
Zip code 19966 is located in Sussex County, Delaware. The primary city is Millsboro.
What is the area code for zip code 19966?
Zip code 19966 in Millsboro, DE uses area code 302. It is located in the Eastern (EST/EDT) timezone.
Is zip code 19966 a good place to live?
Zip code 19966 (Millsboro, DE) has a cost of living index of 91 (100 = national average), a median household income of $75,436, and median home values of $282,100. The median age is 53. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 19966?
The cost of living index for zip code 19966 (Millsboro, DE) is 91, where 100 represents the national average. This area is below the national average. Median home value: $282,100.
What schools serve zip code 19966?
Zip code 19966 in Millsboro, Delaware is served by the local school district of Sussex County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.