ZIP Code 21102
standardSource:
Manchester · Carroll County · Maryland
- Population
- 11,751
- Median income
- $135,069
- Median home value
- $392,800
- Bachelor's or higher
- 34.7%
- Land area
- 104.8 sq mi
112/sq mi
▲ 77% vs US
higher than 94% of US ZIPs
▲ 41% vs US
higher than 79% of US ZIPs
Median age 44.5
New York
ZIP code 21102 in Manchester, Maryland has a population of 11,751. The median household income is $135,069, which is 77% above the national average. Median home value is $392,800, 41% above the US average. 34.7% of residents hold a bachelor's degree or higher.
ZIP code 21102 is classified by USPS as a standard delivery area and covers roughly 104.8 square miles in Manchester, Carroll County, Maryland. The area is home to 11,751 residents, producing a population density of 112 people per square mile, and falls within the New York time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 21102 against Maryland and the nation.
On the economic side, the median household income for ZIP 21102 sits at $135,069 (18% above the Maryland average), while per-capita income is $54,845. The poverty rate stands at 3.4% and the unemployment rate at 1.2%. On housing, the median home value is $392,800 (12% below the state average) with median rent at $1,484 per month, and 89.4% of occupied units are owner-occupied, a direct signal of whether 21102 behaves more like a homeowner neighborhood or a renter-heavy ZIP.
Education and household profile round out the picture: 34.7% of adults hold a bachelor's degree or higher, the median age is 44.5, and the average commute is 35 minutes. We also surface 8 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Carroll County, so you can benchmark 21102 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →
Top industries in ZIP 21102
Top 5 sectors by establishment count
Which industries have the most business establishments in ZIP 21102.
- Construction
Construction
63 establishments
- Other services (except public administration)
Other services (except public administration)
30 establishments
- Professional, scientific, and technical services 21
Professional, scientific, and technical services
21 establishments
- Health care and social assistance 21
Health care and social assistance
21 establishments
- Retail trade 17
Retail trade
17 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + HUD FMR + FHFA HPI ACS demographics, ZBP business establishments, HUD Fair Market Rents, FHFA HPI for ZIP 21102, Manchester, MD · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; HUD FMR + FHFA HPI updated quarterly/annually.
Quick Facts
11,751
Population
104.8
Area (sq mi)
112
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 21102?
44.5
Median Age
51.8%
Male
48.2%
Female
4.9%
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?
$135,069
Median Household Income
+18% vs state
$54,845
Per Capita Income
3.4%
Poverty Rate
1.2%
Unemployment Rate
35.4 min
Mean Commute Time
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?
4,511
Total Housing Units
4,413
Occupied Units
98
Vacant Units
2.73
Avg Household Size
Occupancy Type
$392,800
Median Home Value
-12% vs state
$1,484
Median Rent
1982
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
+7.5%
YoY Change (2024)
245
HPI Index (2000 = 100)
+145%
Total Change Since 2000
Home values in ZIP 21102 have increased 7.5% over the past year (2024). Since 2000, this ZIP has seen +145% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +4.3% | 178 |
| 2021 | +10.1% | 196 |
| 2022 | +9.8% | 215 |
| 2023 | +5.8% | 228 |
| 2024 | +7.5% | 245 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 229 business establishments in ZIP 21102, employing approximately 1,297 people with a combined annual payroll of $57,543,000.
229
Businesses
1,297
Employees
$57.5M
Annual Payroll
13
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Construction | 63 | 27.5% |
| Other services (except public administration) | 30 | 13.1% |
| Professional, scientific, and technical services | 21 | 9.2% |
| Health care and social assistance | 21 | 9.2% |
| Retail trade | 17 | 7.4% |
| Administrative and support and waste management and remediation services | 17 | 7.4% |
| Transportation and warehousing | 13 | 5.7% |
| Accommodation and food services | 13 | 5.7% |
| Finance and insurance | 8 | 3.5% |
| Real estate and rental and leasing | 8 | 3.5% |
| Manufacturing | 5 | 2.2% |
| Wholesale trade | 4 | 1.8% |
| Arts, entertainment, and recreation | 4 | 1.8% |
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 21102 vs 21074 →
More ZIP Codes in Carroll County
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Frequently Asked Questions
What county is ZIP code 21102 in? ▼
What is the population of ZIP code 21102? ▼
What is the median household income in ZIP 21102? ▼
What is the average home value in ZIP 21102? ▼
What is the demographic makeup of ZIP 21102? ▼
How many businesses are in ZIP code 21102? ▼
What are the main industries in ZIP code 21102? ▼
How have home values changed in ZIP code 21102? ▼
What is the education level in ZIP code 21102? ▼
What is the average commute time in ZIP 21102? ▼
What percentage of residents own vs. rent in ZIP 21102? ▼
What is the poverty rate in ZIP code 21102? ▼
ZIP Code Research Guides
Official Data Resources for Manchester, MD
Verify and explore additional data for this area using these official government sources.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023). Business data: Source: Census ZIP Code Business Patterns (ZBP) 2023. Home value trends: Source: FHFA House Price Index (HPI), Five-Digit ZIP Codes.
PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.
Read our methodology , how this data is sourced, computed, and verified.