ZIP Code 21704
standardSource:
Frederick · Frederick County · Maryland
- Population
- 13,321
- Median income
- $161,063
- Median home value
- $612,000
- Bachelor's or higher
- 57.4%
- Land area
- 67.8 sq mi
197/sq mi
▲ 111% vs US
higher than 97% of US ZIPs
▲ 120% vs US
higher than 91% of US ZIPs
Median age 38.6
New York
ZIP code 21704 in Frederick, Maryland has a population of 13,321. The median household income is $161,063, which is 111% above the national average. Median home value is $612,000, 120% above the US average. 57.4% of residents hold a bachelor's degree or higher.
ZIP code 21704 is classified by USPS as a standard delivery area and covers roughly 67.8 square miles in Frederick, Frederick County, Maryland. The area is home to 13,321 residents, producing a population density of 197 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 21704 against Maryland and the nation.
On the economic side, the median household income for ZIP 21704 sits at $161,063 (41% above the Maryland average), while per-capita income is $59,928. The poverty rate stands at 2.9% and the unemployment rate at 3.3%. On housing, the median home value is $612,000 (37% above the state average) with median rent at $2,536 per month, and 82.0% of occupied units are owner-occupied, a direct signal of whether 21704 behaves more like a homeowner neighborhood or a renter-heavy ZIP.
Education and household profile round out the picture: 57.4% of adults hold a bachelor's degree or higher, the median age is 38.6, and the average commute is 34 minutes. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Frederick County, so you can benchmark 21704 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 21704
Top 5 sectors by establishment count
Which industries have the most business establishments in ZIP 21704.
- Professional, scientific, and technical services
Professional, scientific, and technical services
159 establishments
- Retail trade
Retail trade
133 establishments
- Construction
Construction
112 establishments
- Accommodation and food services
Accommodation and food services
91 establishments
- Health care and social assistance
Health care and social assistance
85 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 21704, Frederick, 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
13,321
Population
67.8
Area (sq mi)
197
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 21704?
38.6
Median Age
53.0%
Male
47.0%
Female
23.2%
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?
$161,063
Median Household Income
+41% vs state
$59,928
Per Capita Income
2.9%
Poverty Rate
3.3%
Unemployment Rate
33.5 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?
6,257
Total Housing Units
6,136
Occupied Units
121
Vacant Units
3.21
Avg Household Size
Occupancy Type
$612,000
Median Home Value
+37% vs state
$2,536
Median Rent
2007
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
-6.3%
YoY Change (2024)
251
HPI Index (2000 = 100)
+151%
Total Change Since 2000
Home values in ZIP 21704 have decreased 6.3% over the past year (2024). Since 2000, this ZIP has seen +151% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +2.3% | 179 |
| 2021 | +11.4% | 199 |
| 2022 | +12.6% | 224 |
| 2023 | +19.4% | 268 |
| 2024 | -6.3% | 251 |
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 954 business establishments in ZIP 21704, employing approximately 16,206 people with a combined annual payroll of $1,024,625,000.
954
Businesses
16,206
Employees
$1.0B
Annual Payroll
17
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Professional, scientific, and technical services | 159 | 16.7% |
| Retail trade | 133 | 13.9% |
| Construction | 112 | 11.7% |
| Accommodation and food services | 91 | 9.5% |
| Health care and social assistance | 85 | 8.9% |
| Other services (except public administration) | 81 | 8.5% |
| Wholesale trade | 64 | 6.7% |
| Administrative and support and waste management and remediation services | 49 | 5.1% |
| Real estate and rental and leasing | 42 | 4.4% |
| Finance and insurance | 35 | 3.7% |
| Manufacturing | 29 | 3.0% |
| Transportation and warehousing | 19 | 2.0% |
| Information | 19 | 2.0% |
| Educational services | 14 | 1.5% |
| Arts, entertainment, and recreation | 12 | 1.3% |
| Management of companies and enterprises | 3 | 0.3% |
| Industries not classified | 3 | 0.3% |
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 21704 vs 21717 →
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 21717 | Buckeystown, MD | 54 | 3.5 mi |
| 21754 | Ijamsville, MD | 6,323 | 3.6 mi |
| 21705 | Frederick, MD | 8 | 4.2 mi |
| 21703 | Frederick, MD | 32,854 | 5.1 mi |
| 21770 | Monrovia, MD | 5,164 | 6.3 mi |
| 20838 | Barnesville, MD | 259 | 8.8 mi |
| 21710 | Adamstown, MD | 4,515 | 5.6 mi |
| 21701 | Frederick, MD | 35,293 | 6.7 mi |
| 21774 | New Market, MD | 11,662 | 6.5 mi |
| 21793 | Walkersville, MD | 9,775 | 9.6 mi |
More ZIP Codes in Frederick County
Related Areas
Frequently Asked Questions
What county is ZIP code 21704 in? ▼
What is the population of ZIP code 21704? ▼
What is the median household income in ZIP 21704? ▼
What is the average home value in ZIP 21704? ▼
What is the demographic makeup of ZIP 21704? ▼
How many businesses are in ZIP code 21704? ▼
What are the main industries in ZIP code 21704? ▼
How have home values changed in ZIP code 21704? ▼
What is the education level in ZIP code 21704? ▼
What is the average commute time in ZIP 21704? ▼
What percentage of residents own vs. rent in ZIP 21704? ▼
What is the poverty rate in ZIP code 21704? ▼
ZIP Code Research Guides
Official Data Resources for Frederick, 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.