Oldtown, MD · standard
ZIP Code 21555
Allegany County, Maryland - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 1,936
- 7/sq mi Low-density area
- $53,266
- Median income Below-median income area
- $197,700
- Median home value Near-median home value
- 11.9%
- Bachelor's or higher Below-average bachelor's attainment
National ZIP placement
Oldtown pairs one of the lowest household incomes in the country with below-median home values, in a rural, homeowner-dominated area.
- 19th pct
- household income, US ZIPs
- 43rd pct
- home value, US ZIPs
- 7
- people per sq mi
- 82%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 21555 against every reporting US ZIP.
ZIP code 21555 covers 272.7 square miles in Oldtown, Allegany County, Maryland (a standard USPS delivery area), with a modest 1,936 residents on file, a density of 7 people per square mile, in the New York time zone.
ZIP 21555 reports a modest median household income of $53,266 (53% below the average Maryland ZIP), while per-capita income is $24,708. The poverty rate is 22.1%, so the area-level income figures should not be treated as typical household experience. Home values sit below the statewide ZIP benchmark: the median is $197,700 (56% below the average Maryland ZIP), and median rent is $790; owner occupancy is 82.4%.
Formal educational attainment runs low here: just 11.9% of adults hold a bachelor's degree or higher, the median age is 42.6, and the average commute is -. The page also surfaces 5 ZIP codes within roughly 10 miles and 6 more in Allegany County, so 21555 can be compared with both its immediate and county-level context.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 21555, Oldtown, MD · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.
Quick Facts
1,936
Population
272.7
Area (sq mi)
7
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 21555?
42.6
Median Age
52.5%
Male
47.5%
Female
0.0%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$53,266
Median Household Income
-53% vs state ZIP avg
$24,708
Per Capita Income
22.1%
Poverty Rate
7.6%
Unemployment Rate
How ZIP 21555 ranks among Maryland ZIPs
Oldtown, MD household income vs. every Maryland ZIP code
Median household income among 419 reporting Maryland ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$53,266 4th percentile higher than 4% of 419 Maryland ZIPs
Each bar is a $20K-wide band; taller bars hold more Maryland ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
831housing units
831
Total Housing Units
591
Occupied Units
240
Vacant Units
2.48
Avg Household Size
Occupancy Type
$197,700
Median Home Value
-56% vs state ZIP avg
$790
Median Rent
1975
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 11 business establishments in ZIP 21555, employing approximately 52 people with a combined annual payroll of $995,000.
11
Businesses
52
Employees
$995K
Annual Payroll
2
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Other services (except public administration) | 4 | 36.4% |
| Transportation and warehousing | 3 | 27.3% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 21555 vs 25431 →
ZIP 21555 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 25434
Paw Paw (25434)
2,521 residents
- 21555
Oldtown (21555)
1,936 residents
- 21530
Flintstone (21530)
1,591 residents
- 26763
Springfield (26763)
1,540 residents
- 26722 599
Green Spring (26722)
599 residents
- 25431 453
Levels (25431)
453 residents
What this shows Among its immediate neighbors, ZIP 21555 ranks #2 by population - useful context the national average alone can't give.
ZIP 21555 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 26722
Green Spring (26722)
$75,625 median income
- 25431
Levels (25431)
$68,917 median income
- 26763
Springfield (26763)
$68,384 median income
- 25434
Paw Paw (25434)
$64,487 median income
- 21530
Flintstone (21530)
$63,542 median income
- 21555
Oldtown (21555)
$53,266 median income
What this shows By household income, ZIP 21555 ranks #6 of 6 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 21555, both outside MD so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (1,936 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Allegany County
Related Areas
Frequently Asked Questions
What county is ZIP code 21555 in?
ZIP code 21555 (Oldtown) is located in Allegany County, Maryland. Allegany County contains multiple ZIP codes, see the full list at /counties/allegany-md.
What is the population of ZIP code 21555?
ZIP code 21555 in Oldtown, MD has a population of 1,936 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 21555?
The median household income in ZIP 21555 is $53,266, which is 30% below the national average of $76,288.
What is the average home value in ZIP 21555?
The median home value in ZIP 21555 is $197,700, which is 29% below the national average of $278,155.
What is the demographic makeup of ZIP 21555?
The largest racial group in ZIP 21555 is White at 98.9%.
How many businesses are in ZIP code 21555?
ZIP code 21555 has 11 business establishments employing approximately 52 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 21555?
In ZIP code 21555, 54.0% of residents aged 25+ have a high school diploma or higher, and 11.9% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 21555?
In ZIP code 21555, approximately 82.4% of occupied housing units are owner-occupied and 17.6% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 21555?
The poverty rate in ZIP code 21555 is 22.1% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 21555's numbers, next.
- See how ZIP 21555 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Oldtown, MD ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.