Which ZIP code in New Castle County has the lowest median age?

19717 (Newark), at 19.3 (±0.2), among 24 ZIP codes with at least 1,000 residents.

Why are some ZIP codes missing?

ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

Youngest ZIP codes in New Castle County, DE

These are the 24 ZIP codes in New Castle County with the lowest median age, out of 24 with at least 1,000 residents. 19717 (Newark, 19.3), 19711 (Newark, 34.7) and 19801 (Wilmington, 35.3) lead the list. There is no single "best" ZIP code in New Castle County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Youngest ZIP codes in New Castle County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	19717	Newark	19.3 ±0.2	6,036	0	32
2	19711	Newark	34.7 ±1.1	49,432	18,815	21,334
3	19801	Wilmington	35.3 ±2.1	16,327	8,150	9,442
4	19805	Wilmington	35.5 ±1.4	41,402	15,722	16,115
5	19802	Wilmington	36.8 ±2.3	26,051	10,478	10,665
6	19702	Newark	37.2 ±1.6	55,683	21,252	21,813
7	19734	Townsend	37.5 ±2.9	14,214	4,534	5,064
8	19977	Smyrna	38.1 ±2.3	27,704	9,322	11,076
9	19809	Wilmington	38.6 ±3.4	14,311	6,121	6,605
10	19713	Newark	39.0 ±1.8	30,747	12,526	13,188
11	19703	Claymont	39.0 ±3.1	15,460	6,974	7,192
12	19938	Clayton	39.4 ±2.7	9,561	3,159	3,561
13	19720	New Castle	39.7 ±1.3	62,392	23,641	23,179
14	19709	Middletown	40.2 ±1.7	53,234	18,608	21,477
15	19706	Delaware City	40.4 ±3.6	2,038	758	—
16	19804	Wilmington	41.5 ±1.9	18,779	7,677	7,432
17	19701	Bear	42.1 ±1.9	42,984	16,599	16,507
18	19808	Wilmington	42.6 ±1.5	39,082	15,544	16,695
19	19810	Wilmington	45.3 ±1.6	26,530	10,655	10,813
20	19707	Hockessin	46.0 ±4.0	17,376	6,448	6,591
21	19803	Wilmington	46.4 ±2.4	22,279	8,679	8,959
22	19806	Wilmington	50.3 ±4.5	9,777	6,033	6,349
23	19807	Wilmington	54.0 ±4.4	7,815	3,555	3,831
24	21912	Warwick	58.2 ±7.7	1,536	696	466

How we ranked them

Ranked by median age of all residents, lowest first (ACS 5-year estimates, 2020–2024). ZIP codes need at least 1,000 residents to be ranked; 24 of 32 qualify.

Which of these to mail, and why

Younger ZIP codes skew toward renters, students and young families: fitness, quick-service food, apartments, entertainment and first-time-buyer offers.

The top five ZIP codes on this list hold 53,165 households, on 89 carrier routes with 57,588 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 19717 on the EDDM route map

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Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in New Castle County has the lowest median age?: 19717 (Newark), at 19.3 (±0.2), among 24 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median age of all residents, lowest first (ACS 5-year estimates, 2020–2024).
Why are some ZIP codes missing?: ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.