21144 ZIP Code, Severn, MD
21144 is a ZIP code in Severn, Maryland in Anne Arundel County. It covers 17 square miles of land. The closest ZIP codes are 21077, 21061 and 21108. 37,118 people live here in 13,019 households. At about 2,248 people per square mile it has suburban density, and most homes are owner-occupied (80%). Median household income is $136,684, above the Maryland median of $103,678.
Quick facts
- Mailing city: Severn, MD
- County: Anne Arundel County
- Land area: 17 sq mi
- Population: 37,118
- Median household income: $136,684
- Carrier routes: 22 (13,781 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 37,118 |
| Households | 13,019 |
| Median household income | $136,684 |
| Income per person | $57,707 |
| Median age | 37.7 |
| Homeowners | 80.3% |
| Median home value | $483,700 |
| Median rent | $2,026 |
| Bachelor's degree or higher | 43.5% |
| Average commute (minutes) | 28 |
| Households with kids under 18 | 35.4% |
| Moved in the past year | 9.9% |
| Below the poverty line | 4.4% |
| Broadband internet | 96.6% |
| Speak a non-English language at home | 21.4% |
Household income
| % of households | Value |
|---|---|
| <$10K | 2.9% |
| $10–15K | 1.3% |
| $15–25K | 0.6% |
| $25–35K | 2.2% |
| $35–50K | 4.4% |
| $50–75K | 11.8% |
| $75–100K | 10.8% |
| $100–150K | 21.0% |
| $150–200K | 13.5% |
| $200K+ | 31.5% |
Age
| % of all residents | Value |
|---|---|
| <10 | 12.9% |
| 10–19 | 11.8% |
| 20–24 | 5.9% |
| 25–34 | 15.5% |
| 35–44 | 12.9% |
| 45–54 | 13.1% |
| 55–64 | 13.6% |
| 65–74 | 9.8% |
| 75+ | 4.6% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 58.6% |
| Owned outright | 19.3% |
| Rented | 18.8% |
| Vacant | 3.3% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 65.5% |
| Townhome | 29.8% |
| 2–4 units | 0.8% |
| 5–19 units | 1.2% |
| 20+ units | 0.2% |
| Mobile / other | 2.5% |
Businesses in 21144
344 business establishments with 4,418 employees (ZIP Codes Business Patterns 2023).
- Construction: 67
- Professional, Scientific, and Technical Services: 53
- Other Services (except Public Administration): 52
- Administrative and Support and Waste Management and Remediation Services: 34
- Retail Trade: 32
- Accommodation and Food Services: 20
- Transportation and Warehousing: 17
- Health Care and Social Assistance: 15
EDDM carrier routes
21144 has 22 USPS carrier routes with 13,781 residential and 188 business mailboxes. Open the EDDM route map.
Carrier routes in 21144
21144 has 22 USPS carrier routes (22 rural (R)) with 13,781 residential and 188 business mailboxes. Routes range from 404 homes (R123) to 853 homes (R119); the median route has 589 homes. The Census counted 13,019 households in 21144 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 2 |
| 500–749 | 16 |
| 750–999 | 4 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 21144 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route R110 — USPS business mailboxes 36, 506 homes
- Route R117 — USPS business mailboxes 33, 516 homes
- Route R105 — USPS business mailboxes 26, 536 homes
- Route R111 — USPS business mailboxes 18, 561 homes
- Route R104 — USPS business mailboxes 18, 439 homes
Select these 5 routes on the route map
Every carrier route in 21144
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R101 | Rural | 628 | 4 | $150,509 | — | — | — |
| R102 | Rural | 582 | 0 | $125,717 | — | — | — |
| R103 | Rural | 540 | 3 | $183,788 | — | — | — |
| R104 | Rural | 439 | 18 | $182,655 | — | — | — |
| R105 | Rural | 536 | 26 | $138,468 | — | — | — |
| R106 | Rural | 849 | 2 | $64,163 | — | — | — |
| R108 | Rural | 749 | 1 | $155,032 | — | — | — |
| R109 | Rural | 839 | 3 | $71,900 | — | — | — |
| R110 | Rural | 506 | 36 | $125,717 | — | — | — |
| R111 | Rural | 561 | 18 | $138,468 | — | — | — |
| R112 | Rural | 562 | 3 | $168,471 | — | — | — |
| R113 | Rural | 571 | 10 | $183,788 | — | — | — |
| R114 | Rural | 720 | 0 | $155,032 | — | — | — |
| R115 | Rural | 815 | 0 | $138,519 | — | — | — |
| R116 | Rural | 639 | 7 | $183,788 | — | — | — |
| R117 | Rural | 516 | 33 | $182,655 | — | — | — |
| R118 | Rural | 616 | 0 | $91,530 | — | — | — |
| R119 | Rural | 853 | 1 | $52,580 | — | — | — |
| R120 | Rural | 705 | 15 | $94,009 | — | — | — |
| R121 | Rural | 556 | 3 | $183,788 | — | — | — |
| R122 | Rural | 595 | 5 | $183,788 | — | — | — |
| R123 | Rural | 404 | 0 | $137,620 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 21144 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
- 21077 — Severn CDP, MD (2.9 mi)
- 21061 — Glen Burnie CDP, MD (3.7 mi)
- 21108 — Severna Park CDP, MD (3.7 mi)
- 21240 (3.8 mi)
- 20755 — Fort Meade CDP, MD (3.9 mi)
- 21076 — Severn CDP, MD (4.3 mi)
- 21113 — Odenton CDP, MD (4.4 mi)
- 21054 — Odenton CDP, MD (4.5 mi)
Areas that include 21144
- Severn, MD ZIP codes — 3 ZIP codes
- Gambrills, MD ZIP codes — 3 ZIP codes
- Anne Arundel County ZIP codes — 41 ZIP codes
- Maryland ZIP code data
Mail every home in 21144
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) 21144, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 21144 in?
- 21144 is a Severn, MD mailing address. By land area, 72% lies inside Severn, 25% lies inside Gambrills and 3% lies inside Odenton.
- What county is 21144 in?
- 21144 is in Anne Arundel County.
- What is the population of 21144?
- About 37,118 people (±2,361), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 37,295.
- What is the median household income in 21144?
- $136,684 (±$7,881), compared with $103,678 for Maryland as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 21144?
- 22 USPS carrier routes with 13,781 residential and 188 business mailboxes (13,969 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 21144?
- The closest, measured center to center: 21077 (2.9 mi, Severn), 21061 (3.7 mi, Glen Burnie), 21108 (3.7 mi, Severna Park), 21240 (3.8 mi), 20755 (3.9 mi, Fort Meade) and 21076 (4.3 mi, Severn).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.