19973 ZIP Code, Seaford, DE
19973 is a ZIP code in Seaford, Delaware — mostly in Sussex County (93% of its land), with smaller parts in Dorchester County. It covers 84 square miles of land. The closest ZIP codes are 19931, 19933 and 19956. 26,834 people live here in 10,266 households. With about 319 people per square mile it is lightly settled, and most homes are owner-occupied (72%). Median household income is $64,387, below the Delaware median of $84,954.
Quick facts
- Mailing city: Seaford, DE
- County: Sussex County
- Land area: 84 sq mi
- Population: 26,834
- Median household income: $64,387
- Carrier routes: 17 (11,201 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 26,834 |
| Households | 10,266 |
| Median household income | $64,387 |
| Income per person | $34,061 |
| Median age | 41.3 |
| Homeowners | 72.3% |
| Median home value | $278,300 |
| Median rent | $1,135 |
| Bachelor's degree or higher | 17.5% |
| Average commute (minutes) | 29.2 |
| Households with kids under 18 | 33.3% |
| Moved in the past year | 9.0% |
| Below the poverty line | 16.7% |
| Broadband internet | 89.7% |
| Speak a non-English language at home | 14.3% |
Household income
| % of households | Value |
|---|---|
| <$10K | 5.9% |
| $10–15K | 4.9% |
| $15–25K | 4.2% |
| $25–35K | 10.5% |
| $35–50K | 13.6% |
| $50–75K | 15.8% |
| $75–100K | 14.8% |
| $100–150K | 13.6% |
| $150–200K | 9.3% |
| $200K+ | 7.3% |
Age
| % of all residents | Value |
|---|---|
| <10 | 13.2% |
| 10–19 | 12.2% |
| 20–24 | 6.5% |
| 25–34 | 11.4% |
| 35–44 | 11.3% |
| 45–54 | 11.9% |
| 55–64 | 13.3% |
| 65–74 | 13.0% |
| 75+ | 7.1% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 42.5% |
| Owned outright | 24.7% |
| Rented | 25.1% |
| Vacant | 7.7% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 71.3% |
| Townhome | 2.9% |
| 2–4 units | 4.7% |
| 5–19 units | 4.7% |
| 20+ units | 3.7% |
| Mobile / other | 12.7% |
Businesses in 19973
608 business establishments with 9,140 employees (ZIP Codes Business Patterns 2023).
- Retail Trade: 98
- Health Care and Social Assistance: 85
- Other Services (except Public Administration): 65
- Construction: 51
- Accommodation and Food Services: 51
- Administrative and Support and Waste Management and Remediation Services: 38
- Professional, Scientific, and Technical Services: 37
- Wholesale Trade: 36
EDDM carrier routes
19973 has 17 USPS carrier routes with 11,201 residential and 670 business mailboxes. Open the EDDM route map.
Carrier routes in 19973
19973 has 17 USPS carrier routes (8 city (C), 9 rural (R)) with 11,201 residential and 670 business mailboxes. Routes range from 458 homes (C002) to 901 homes (R009); the median route has 642 homes. The Census counted 10,266 households in 19973 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 2 |
| 500–749 | 10 |
| 750–999 | 5 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 19973 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C007 — USPS business mailboxes 104, 767 homes
- Route C005 — USPS business mailboxes 94, 520 homes
- Route C008 — USPS business mailboxes 89, 740 homes
- Route C001 — USPS business mailboxes 64, 873 homes
- Route R004 — USPS business mailboxes 63, 604 homes
Select these 5 routes on the route map
Every carrier route in 19973
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C001 | City | 873 | 64 | $102,302 | — | — | — |
| C002 | City | 458 | 25 | $36,112 | — | — | — |
| C003 | City | 481 | 19 | $54,336 | — | — | — |
| C004 | City | 786 | 58 | $103,416 | — | — | — |
| C005 | City | 520 | 94 | $115,407 | — | — | — |
| C006 | City | 514 | 47 | $103,416 | — | — | — |
| C007 | City | 767 | 104 | $62,890 | — | — | — |
| C008 | City | 740 | 89 | $101,078 | — | — | — |
| R001 | Rural | 605 | 7 | $54,336 | — | — | — |
| R002 | Rural | 661 | 7 | $115,407 | — | — | — |
| R003 | Rural | 616 | 17 | $76,270 | — | — | — |
| R004 | Rural | 604 | 63 | $54,418 | — | — | — |
| R005 | Rural | 642 | 7 | $91,296 | — | — | — |
| R006 | Rural | 803 | 8 | $115,407 | — | — | — |
| R008 | Rural | 682 | 7 | $103,416 | — | — | — |
| R009 | Rural | 901 | 13 | $75,258 | — | — | — |
| R010 | Rural | 548 | 41 | $102,302 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 19973 on the EDDM route map.
How route demographics are estimated
Mailbox counts come from USPS; demographics are estimates
The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).
How a route gets its figures: the block-group length-share method
We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.
Margins of error
Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.
Different years
USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.
Why some routes show identical figures
Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.
Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Nearby ZIP codes
- 19931 — Bethel town, DE (4.6 mi)
- 19933 — Bridgeville town, DE (6.9 mi)
- 19956 — Laurel town, DE (7.6 mi)
- 21861 — Sharptown town, MD (8.8 mi)
- 21659 — Galestown town, MD (10.4 mi)
- 21632 — Federalsburg town, MD (10.5 mi)
- 19940 — Delmar town, DE (11.3 mi)
- 19947 — Georgetown town, DE (12.1 mi)
Areas that include 19973
- Seaford, DE ZIP codes — 1 ZIP code
- Blades, DE ZIP codes — 1 ZIP code
- Sussex County ZIP codes — 23 ZIP codes
- Delaware ZIP code data
Where it ranks
- No. 4 of 21: highest share of households with children in Sussex County
- No. 5 of 21: lowest median age in Sussex County
Mail every home in 19973
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 19973, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 19973 in?
- 19973 is a Seaford, DE mailing address. By land area, 6% lies inside Seaford; the rest is outside any Census-defined city or community.
- What county is 19973 in?
- 19973 is mostly in Sussex County (93% of its land), with smaller parts in Dorchester County.
- What is the population of 19973?
- About 26,834 people (±1,722), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 25,550.
- What is the median household income in 19973?
- $64,387 (±$7,347), compared with $84,954 for Delaware as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 19973?
- 17 USPS carrier routes with 11,201 residential and 670 business mailboxes (11,869 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 19973?
- The closest, measured center to center: 19931 (4.6 mi, Bethel), 19933 (6.9 mi, Bridgeville), 19956 (7.6 mi, Laurel), 21861 (8.8 mi, Sharptown), 21659 (10.4 mi, Galestown) and 21632 (10.5 mi, Federalsburg).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.