Data Last Updated: December 1, 2024

NEW CASTLE County, DE ZIP Codes

NEW CASTLE County, DE Covers 50 ZIP Codes

ZIP Code	Classification	City	Population	Area Code(s)
ZIP Code 19701	General	Bear	42,717	302
ZIP Code 19702	General	Newark	55,653	302
ZIP Code 19703	General	Claymont	16,175	302
ZIP Code 19706	P.O. Box	Delaware City	1,938	302
ZIP Code 19707	General	Hockessin	17,274	302
ZIP Code 19708	P.O. Box	Kirkwood	0	302
ZIP Code 19709	General	Middletown	49,599	302
ZIP Code 19710	P.O. Box	Montchanin	108	302
ZIP Code 19711	General	Newark	48,477	302
ZIP Code 19713	General	Newark	31,867	302
ZIP Code 19714	P.O. Box	Newark	0	302
ZIP Code 19715	P.O. Box	Newark	0	302
ZIP Code 19716	General	Newark	42	302
ZIP Code 19717	General	Newark	6,201	302
ZIP Code 19718	Unique	Newark	0	302
ZIP Code 19720	General	New Castle	61,043	302
ZIP Code 19721	Unique	New Castle	0	302
ZIP Code 19726	Unique	New Castle	0	302
ZIP Code 19730	P.O. Box	Odessa	472	302
ZIP Code 19731	P.O. Box	Port Penn	329	302
ZIP Code 19732	P.O. Box	Rockland	223	302
ZIP Code 19733	P.O. Box	Saint Georges	320	302
ZIP Code 19734	General	Townsend	14,116	302
ZIP Code 19735	General	Winterthur	16	302
ZIP Code 19736	General	Yorklyn	34	302
ZIP Code 19801	General	Wilmington	16,219	302
ZIP Code 19802	General	Wilmington	26,189	302
ZIP Code 19803	General	Wilmington	21,886	302
ZIP Code 19804	General	Wilmington	18,292	302
ZIP Code 19805	General	Wilmington	39,985	302
ZIP Code 19806	General	Wilmington	10,083	302
ZIP Code 19807	General	Wilmington	8,089	302
ZIP Code 19808	General	Wilmington	39,285	302
ZIP Code 19809	General	Wilmington	14,658	302
ZIP Code 19810	General	Wilmington	25,270	302
ZIP Code 19850	P.O. Box	Wilmington	0	302
ZIP Code 19880	P.O. Box	Wilmington	0	302
ZIP Code 19884	Unique	Wilmington	0	302
ZIP Code 19885	Unique	Wilmington	0	302
ZIP Code 19886	Unique	Wilmington	0	302
ZIP Code 19890	Unique	Wilmington	0	302
ZIP Code 19891	Unique	Wilmington	0	302
ZIP Code 19892	Unique	Wilmington	0	302
ZIP Code 19893	Unique	Wilmington	0	302
ZIP Code 19895	Unique	Wilmington	0	302
ZIP Code 19897	Unique	Wilmington	0	302
ZIP Code 19898	Unique	Wilmington	0	302
ZIP Code 19899	P.O. Box	Wilmington	0	302
ZIP Code 19938 *	General	Clayton	10,131	302
ZIP Code 19977 *	General	Smyrna	27,505	302

* Indicates a Multi County ZIP Code, whose primary County is something other than New Castle, DE.

Timezone(s): All Time Zones found within this county. In the United States, there are 7 standard time zones which are, from west to east: Hawaii-Aleutian, Alaska, Pacific, Mountain, Central, Eastern, Atlantic. Also included in U.S. Territories are Samoa, Guam and Palau. The alignment between ZIP codes and time zones is not perfect. A single time zone can cover multiple ZIP codes, and, conversely, a single ZIP code could theoretically span across multiple time zones, although this is quite rare.	Eastern

Population: The total Population for New Castle County, DE, taken from the 2020 U.S. Census DP1. This population total includes all people residing in and counts them regardless of citizenship or immigration status. Include are U.S. Citizens, permanent residents, temporary migrants, and undocumented workers. The total population represents people who live in the state, not just those present on the day of the census. State Population is critical in determining political representation, funding allocation, planning and policy-making, and demographic analysis.	570,719 (More Details)
Male Population: The sum of all males for New Castle County, DE from the 2020 U.S. Census DP1. Each respondent self-identified their gender on the survey, as they were asked to indicate their gender assigned at birth. The male population information is important for healthcare planning, policy making, social research, and economic planning and development.	274,700
Female Population: The sum of all females for New Castle County, DE from the 2020 U.S. Census DP1. Each respondent self-identified their gender on the survey, as they were asked to indicate their gender assigned at birth. The female population information is important for healthcare planning, policy making, social research, and economic planning and development.	296,019
Median Age: The median age of the total population of this county. Median age is not a future prediction, it is the actual number from the 2020 Census. Median age is the middle age of the population. Half the population is older than the average age and half is younger.	39

ZIP Codes: The total number of ZIP Codes which at least partially fall inside New Castle County, DE. Did you know that approximately 23% of ZIP Codes cross county lines? Several even cross State lines. ZIP Codes do not follow other geographic boundaries because they were created exclusively for the expedient delivery of mail.	52
Cities: The total number of City names which are associated with ZIP Codes that partially or wholly cross into New Castle County, DE. Alongside the official city name, USPS also recognizes certain alternate names for cities or towns that can be used in mailing addresses. These may include towns, villages, abbreviations, names in other languages, or names that have been commonly used historically.	17
Counties: The total number of counties associated with ZIP Codes that are at least partially part of New Castle County, DE.	1
Area Codes: The total number of Area Codes associated with ZIP Codes in New Castle County, DE. Area codes are used in the North American Numbering Plan (NANP) to facilitate phone routing. Each area code identifies a specific geographic area (usually part of a state or territory) and allows calls to be routed to the correct area. There are approximately 350 area codes in use in the United States.	1

Total Area: The approximate amount of area covered by New Castle, DE in square miles. This includes all land and water areas within the legal county boundaries.	494 square miles (county)
Land Area: The approximate amount of land area covered by New Castle, DE in square miles. Land area data provided by the Census Bureau are based on geographic boundaries that include the mainland, islands, inland, coastal, Great Lakes, and territorial waters associated with each state. Land area is important in many types of statistical analysis. For example, population density, the number of people per unit of land area, is a commonly used statistic based on this data. Land area measurements are also important for urban planning, environmental studies, and economic analysis.	426 square miles (county)
Water Area: The approximate amount of water area covered by New Castle, DE in square miles. Calculations for water area take into account inland bodies of water, coastal regions, Great Lakes, and territorial sea waters. This encompassed features such as lakes, reservoirs, rivers, and coastal water bodies. Water surface data are especially important for environmental and conservation planning, water resource management, transportation, and recreational planning.	68 square miles (county)

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NEW CASTLE, DE Demographic Information

* Demographic data is based on 2020 Census.

Total population of NEW CASTLE County, DE: Total Population from the 2020 Census. This reflects the exact population of the geographic area at that point in time, not future estimates, regardless of citizenship or immigration status. It is intended to count all persons living within the geographic area, not just those present on the day of the census.	570,719
Male population of NEW CASTLE County, DE: The Male Population from the 2020 Census. This is not a forecast for the future, but an exact count for this geographic area at the time of the Census. Each respondent self-identified their gender on the survey, as they were asked to indicate their gender assigned at birth. The Male Population information is important for healthcare planning, policy making, social research, and economic planning and development.	274,700
Female population of NEW CASTLE County, DE: The Female Population from the 2020 Census. This is not a forecast for the future, but an exact count for this geographic area at the time of the Census. Each respondent self-identified their gender on the survey, as they were asked to indicate their gender assigned at birth. The Female Population information is important for healthcare planning, policy making, social research, and economic planning and development.	296,019
Median age (years): The Median Age of the Total Population from the 2020 Census for this geographic area. Median age is not a future prediction, it is the actual calculated age from the 2020 Census. Median age is the middle age of the population. Half the population is older than the average age and half is younger. Median Age can relate how young or old a geographic area is compared to others. If one area is 44 and the other is 40, then the first are is an average of 4 years older.	39.0
White Population: The White Population is an exact count from the 2020 Census for this geographic area. The numbers for the White Population are not future projections. On the 2020 U.S. Census questionnaire, people were asked to check all races which applied to them, including White. This count includes all who selected White/Caucasian in their response, even if they selected another race as well.	314,231
Black Population: The Black Population is an exact count from the 2020 Census for this geographic area. The numbers for the Black Population are not future projections. On the 2020 U.S. Census questionnaire, people were asked to check all races which applied to them, including Black or African American. This count includes all who selected Black or African American in their response, even if they selected another race as well.	146,544
Indian Population: The American Indian and Alaska Native Population is an exact count from the 2020 Census for this geographic area and not estimates for the future. On the 2020 U.S. Census questionnaire, people were asked to check all races which applied to them, including American Indian and Alaska Native. This count includes all who selected American Indian and Alaska Native in their response, even if they selected another race as well.	2,156
Asian Population: The Asian Population is an exact count from the 2020 Census for this geographic area, not future projections. On the U.S. Census questionnaire, people were asked to check all races which applied to them, including Chinese, Filipino, Asian Indian, Vietnamese, Korean, Japanese, or Other Asian. This count includes all who selected one of these options in their response, even if they selected another race as well.	35,200
Hawaiian Population: The Hawaiian or Pacific Islander Population is an exact count from the 2020 Census for this geographic area and are not future projections. On the 2020 U.S. Census questionnaire, people were asked to check all races which applied to them, including Native Hawaiian and Pacific Islander. This count includes all who selected either Hawaiian or Pacific Islander in their response, even if they selected another race as well.	175
Hispanic Population: The Hispanic Population is an exact count from the 2020 Census for this geographic area and is not an estimate or future projection. On the 2020 U.S. Census questionnaire, people were first asked for their Ethnicity, including if they were from Hispanic, Latino, or Spanish Origin, including Mexican, Mexican American, Chicano, Puerto Rican, Cuban, or other ethnic origin. This count includes all who affirmed that they were part of this ethnic origin. Respondents who selected this option were also asked to select a race separately and would be counted once in this number as well as the race they chose as well. From the U.S. Census definition, Hispanic is an ethnic origin and not a race.	63,516
Median age (Male): The Median Age of all Males from the 2020 Census for this geographic area. The Male Median Age is the actual average from the 2020 Census, not an estimate or future projection. Median Age is the average age of the population. Half of the population is older than the average age and the other half is younger. Gender is self-reported by individuals when asked about their sex at birth.	37.6
Median age (Female): The Median Age of all Females from the 2020 Census for this geographic area. The Female Median Age is the actual average from the 2020 Census, not an estimate or future projection. Median Age is the average age of the population. Half of the population is older than the average age and the other half is younger. Gender is self-reported by individuals when asked about their sex at birth.	40.3
Total Households: Total Number of Households from the 2020 U.S. Census for this geographic area. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone.	219,571
Married-Couple Households: Total Married-Couple Households is based on the 2020 U.S. Census and is not an estimate. Under the U.S. Census Bureau definition, Married Couple Households refers to the count of households where the householder and his or her spouse are listed as members of the same household. It does include same-sex marriage households and the households themselves may also include other individuals, such as children or other relatives.
Average Household Size for NEW CASTLE County, DE: The Average Household Size, is obtained by dividing the number of people in Households (excluding those in group quarters, nursing home, prisons, and dorm rooms) by the number of Households. A Household includes everyone living in a residential unit. Those who do not live in a household are classified as living in group accommodation. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.53
Average family size of NEW CASTLE County, DE: Average Family Size is calculated by dividing the number of people in a Family Household by the number of Family Households. The U.S. Census Bureau defines family households as households consisting of two or more individuals who are related by birth, marriage, or adoption. They also may include other unrelated people. Non-family households consist of people who live alone or who share their residence with unrelated individuals. The Average Family Size only looks at the households classified as Family Households. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	3.16
Total housing units for NEW CASTLE County, DE: The total number of Housing Units is the number of occupied units + the number of vacant units. Ownership is defined by whether the unit is occupied by an owner or by a tenant. Owner occupancy means that the owner lives in the unit. This value comes from the 2020 U.S. Census and is not a projection or estimate.	233,747

NEW CASTLE County, DE ZIP Codes

NEW CASTLE County, DE Covers 50 ZIP Codes

NEW CASTLE, DE Demographic Information

NEW CASTLE County, DE Covers 17 Cities