Residential delivery area · Maryland
ZIP Code 21904: Port Deposit, MD
ZIP code 21904 uses the postal name Port Deposit, Maryland and lies entirely in Cecil County (Census 2020 ZIP-county file). About 6,200 people live there (Census Bureau, ACS 2020-2024). Median household income is $88,136 (Census Bureau, ACS 2020-2024). By Census place, 10% of its land lies in Port Deposit, and 2% in smaller places; 88% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Port Deposit · its only residential ZIP
- County
- Cecil County
- Census places
- Port Deposit
- Metro area
- Philadelphia-Camden-Wilmington, PA-NJ-DE-MD
- House district
- MD-1 119th Congress
- State
- Maryland
- Time zone
- Eastern
- Land area
- 23.6 sq mi · 264 people per sq mi
Where is ZIP code 21904?
21904 centers on 39.615°, -76.068° and covers 23.6 square miles of land plus 2.5 of water. It borders 7 ZIP codes: 21903, 21917, 21078, 21901, 21911, 21918, 21034.
The map draws ZIP code areas only. For the streets inside 21904, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 21904 compare with the rest of Cecil County?
| Measure | 21904 | In Cecil County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 6,233 | 4th of 15 | 221st of 477 |
| Median household income | $88k | 5th of 7 | 204th of 293 |
| Median home value | $334k | 6th of 9 | 240th of 320 |
Its median household income is higher than in 71% of U.S. residential ZIP codes, and it is denser than 66% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 21904?
The 2020 Census counted 6,689 people in 21904; the ACS, which samples households over 2020-2024, estimates 6,233. Between the 2010 and 2020 censuses its population fell 7.8% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 6,233±716 (90% margin)
- 2020 Census count
- 6,689−7.8% since 2010 (7,252)
- Households
- 2,269
- Median age
- 39.7
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 21904?
Of the 6,233 people the ACS estimates in 21904, 21.8% are under 18 and 13.3% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (86.1%).
- Under 1821.8%
- 18 to 6464.9%
- 65 and older13.3%
- White, not Hispanic86.1%
- Hispanic or Latino4.8%
- Other or two or more4.5%
- Black, not Hispanic3.9%
- Asian, not Hispanic0.8%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 21904 earn?
Median household income is $88,136 (ACS 2020-2024), the 5th highest of the 7 ranked ZIP codes in Cecil County. It fell from $106,169 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $88,136±$12,508
- Income per person
- $41,351
- Below the poverty line
- 7.7%
- Unemployed (of the labor force)
- 8.3%
- Adults 25+ with a bachelor's degree
- 28.0%
- Adjusted gross income per tax return, 2022
- $80,5953,340 returns; wages 73% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 21904?
FHFA's house price index for 21904, built from repeat sales and appraisals of the same homes, rose 85% from 2015 to 2025 and rose 60% from 2020 to 2025, and moved +13.8% in 2025.
- Median home value (owners' estimate)
- $333,500
- Median gross rent
- $1,422
- Homes owned by their occupants
- 89.0%
- Housing units
- 2,622
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 21904?
78 business establishments had a location in this ZIP code in 2023, 5 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction14
- Accommodation and food services10
- Other services (except public administration)10
- Retail trade7
- Real estate and rental and leasing7
- Professional, scientific, and technical services7
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 21904?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 21903 | Perryville | 5,692 | $79k | 3.1 mi |
| 21917 | Colora | 2,233 | $97k | 4.2 mi |
| 21078 | Havre De Grace | 20,030 | $107k | 5.5 mi |
| 21901 | North East | 19,514 | $114k | 5.8 mi |
| 21911 | Rising Sun | 10,551 | $105k | 5.8 mi |
| 21918 | Conowingo | 4,169 | $85k | 7.2 mi |
| 21034 | Darlington | 2,846 | $78k | 8.4 mi |
| 21902 | Perry Point | 340 | – | 4.4 mi (near) |
| 21914 | Charlestown | 810 | $67k | 5.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.