Residential delivery area · Maryland
ZIP Code 21917: Colora, MD
ZIP code 21917 uses the postal name Colora, Maryland and lies entirely in Cecil County (Census 2020 ZIP-county file). About 2,200 people live there (Census Bureau, ACS 2020-2024). Median household income is $96,750 (Census Bureau, ACS 2020-2024). Its land lies outside any incorporated or census-designated place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Colora · its only residential ZIP
- County
- Cecil County
- Metro area
- Philadelphia-Camden-Wilmington, PA-NJ-DE-MD
- House district
- MD-1 119th Congress
- State
- Maryland
- Time zone
- Eastern
- Land area
- 7.8 sq mi · 285 people per sq mi
Where is ZIP code 21917?
21917 centers on 39.672°, -76.097° and covers 7.8 square miles of land plus 0.1 of water. It borders 3 ZIP codes: 21911, 21904, 21918.
The map draws ZIP code areas only. For the streets inside 21917, 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 21917 compare with the rest of Cecil County?
| Measure | 21917 | In Cecil County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 2,233 | 9th of 15 | 302nd of 477 |
| Median household income | $97k | 4th of 7 | 177th of 293 |
| Median home value | $409k | 1st of 9 | 174th of 320 |
Its median household income is higher than in 79% 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 21917?
The 2020 Census counted 2,384 people in 21917; the ACS, which samples households over 2020-2024, estimates 2,233. Between the 2010 and 2020 censuses its population fell 5.4% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 2,233±484 (90% margin)
- 2020 Census count
- 2,384−5.4% since 2010 (2,520)
- Households
- 818
- Median age
- 42.4
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 21917?
Of the 2,233 people the ACS estimates in 21917, 22.7% are under 18 and 15.9% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (82.7%), then Hispanic or Latino (14.8%).
- Under 1822.7%
- 18 to 6461.5%
- 65 and older15.9%
- White, not Hispanic82.7%
- Hispanic or Latino14.8%
- Black, not Hispanic1.5%
- Other or two or more1.1%
- Asian, not Hispanic0.0%
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 21917 earn?
Median household income is $96,750 (ACS 2020-2024), the 4th highest of the 7 ranked ZIP codes in Cecil County. It is not measurably different from 2015-2019 ($101,711 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $96,750±$22,551
- Income per person
- $42,367
- Below the poverty line
- 7.4%
- Unemployed (of the labor force)
- 4.1%
- Adults 25+ with a bachelor's degree
- 12.1%
- Adjusted gross income per tax return, 2022
- $77,1611,270 returns; wages 77% 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 21917?
FHFA's house price index for 21917, built from repeat sales and appraisals of the same homes, rose 54% from 2015 to 2025 and rose 38% from 2020 to 2025, and moved +1.9% in 2025.
- Median home value (owners' estimate)
- $409,400
- Median gross rent
- –
- Homes owned by their occupants
- 94.0%
- Housing units
- 818
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 21917?
24 business establishments had a location in this ZIP code in 2023, 1 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction4
- Other services (except public administration)4
- Retail trade3
- Health care and social assistance3
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 21917?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 21911 | Rising Sun | 10,551 | $105k | 3.8 mi |
| 21904 | Port Deposit | 6,233 | $88k | 4.2 mi |
| 21918 | Conowingo | 4,169 | $85k | 4.2 mi |
| 19362 | Nottingham, PA | 6,092 | $89k | 5.7 mi (near) |
| 21034 | Darlington | 2,846 | $78k | 7.0 mi (near) |
| 21903 | Perryville | 5,692 | $79k | 7.3 mi (near) |
| 17563 | Peach Bottom, PA | 3,952 | $94k | 8.0 mi (near) |
| 21078 | Havre De Grace | 20,030 | $107k | 8.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.