21623 ZIP Code, Church Hill, MD
21623 is a ZIP code in Church Hill, Maryland in Queen Anne's County. It covers 36 square miles of land. The closest ZIP codes are 21644, 21607 and 21617. 2,669 people live here in 893 households. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (85%). Median household income is $78,345, below the Maryland median of $103,678.
Quick facts
- Mailing city: Church Hill, MD
- County: Queen Anne's County
- Land area: 36 sq mi
- Population: 2,669
- Median household income: $78,345
- Carrier routes: 3 (851 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 2,669 |
| Households | 893 |
| Median household income | $78,345 |
| Income per person | $35,506 |
| Median age | 36.4 |
| Homeowners | 84.8% |
| Median home value | $391,400 |
| Median rent | $1,233 |
| Bachelor's degree or higher | 21.6% |
| Average commute (minutes) | 36.2 |
| Households with kids under 18 | 35.3% |
| Moved in the past year | 10.0% |
| Below the poverty line | 6.6% |
| Broadband internet | 82.9% |
| Speak a non-English language at home | 20.5% |
Household income
| % of households | Value |
|---|---|
| <$10K | 1.0% |
| $10–15K | 0.3% |
| $15–25K | 5.2% |
| $25–35K | 3.4% |
| $35–50K | 9.0% |
| $50–75K | 23.6% |
| $75–100K | 23.3% |
| $100–150K | 14.4% |
| $150–200K | 8.7% |
| $200K+ | 11.1% |
Age
| % of all residents | Value |
|---|---|
| <10 | 13.6% |
| 10–19 | 12.4% |
| 20–24 | 4.7% |
| 25–34 | 15.6% |
| 35–44 | 16.7% |
| 45–54 | 9.8% |
| 55–64 | 12.4% |
| 65–74 | 10.8% |
| 75+ | 3.9% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 62.2% |
| Owned outright | 18.7% |
| Rented | 14.3% |
| Vacant | 4.8% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 82.0% |
| Townhome | 5.8% |
| 2–4 units | 1.1% |
| 5–19 units | 3.5% |
| 20+ units | 0.0% |
| Mobile / other | 7.7% |
Businesses in 21623
38 business establishments with 183 employees (ZIP Codes Business Patterns 2023).
- Construction: 14
- Administrative and Support and Waste Management and Remediation Services: 7
- Transportation and Warehousing: 3
- Arts, Entertainment, and Recreation: 3
EDDM carrier routes
21623 has 3 USPS carrier routes with 851 residential and 14 business mailboxes. Open the EDDM route map.
Carrier routes in 21623
21623 has 3 USPS carrier routes (3 rural (R)) with 851 residential and 14 business mailboxes. Routes range from 172 homes (R001) to 470 homes (R002); the median route has 209 homes. The Census counted 893 households in 21623 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 2 |
| 250–499 | 1 |
| 500–749 | 0 |
| 750–999 | 0 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 21623 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route R002 — USPS business mailboxes 6, 470 homes
- Route R003 — USPS business mailboxes 5, 209 homes
- Route R001 — USPS business mailboxes 3, 172 homes
Select these 3 routes on the route map
Every carrier route in 21623
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R001 | Rural | 172 | 3 | $75,139 | — | — | — |
| R002 | Rural | 470 | 6 | $96,839 | — | — | — |
| R003 | Rural | 209 | 5 | $96,839 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 21623 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
- 21644 (5 mi)
- 21607 — Barclay town, MD (6 mi)
- 21617 — Centreville town, MD (6.6 mi)
- 21668 — Sudlersville town, MD (7.7 mi)
- 21628 — Crumpton CDP, MD (7.9 mi)
- 21620 — Fairlee CDP, MD (8.5 mi)
- 21640 — Henderson town, MD (8.7 mi)
- 21649 — Marydel town, MD (9.9 mi)
Areas that include 21623
- Church Hill, MD ZIP codes — 1 ZIP code
- Queen Anne's County ZIP codes — 15 ZIP codes
- Maryland ZIP code data
Where it ranks
- No. 4 of 12: highest share of owner-occupied homes in Queen Anne's County
- No. 4 of 12: highest share of households with children in Queen Anne's County
- No. 3 of 12: lowest median age in Queen Anne's County
- No. 1 of 11: fastest population growth in Queen Anne's County
Mail every home in 21623
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) 21623, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 21623 in?
- 21623 is a Church Hill, MD mailing address. By land area, 2% lies inside Church Hill; the rest is outside any Census-defined city or community.
- What county is 21623 in?
- 21623 is in Queen Anne's County.
- What is the population of 21623?
- About 2,669 people (±521), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 2,244.
- What is the median household income in 21623?
- $78,345 (±$11,860), 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 21623?
- 3 USPS carrier routes with 851 residential and 14 business mailboxes (865 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 21623?
- The closest, measured center to center: 21644 (5 mi), 21607 (6 mi, Barclay), 21617 (6.6 mi, Centreville), 21668 (7.7 mi, Sudlersville), 21628 (7.9 mi, Crumpton) and 21620 (8.5 mi, Fairlee).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.