21701 ZIP Code, Frederick, MD
21701 is a ZIP code in Frederick, Maryland in Frederick County. It covers 40 square miles of land. The closest ZIP codes are 21793, 21774 and 21705. 43,048 people live here in 18,651 households, more than in 9 of every 10 Maryland ZIP codes. At about 1,084 people per square mile it has suburban density, and owners and renters are mixed (66% own). Median household income is $106,577, close to the Maryland median of $103,678.
Quick facts
- Mailing city: Frederick, MD
- County: Frederick County
- Land area: 40 sq mi
- Population: 43,048
- Median household income: $106,577
- Carrier routes: 35 (20,269 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 43,048 |
| Households | 18,651 |
| Median household income | $106,577 |
| Income per person | $60,194 |
| Median age | 39.6 |
| Homeowners | 66.2% |
| Median home value | $435,000 |
| Median rent | $1,672 |
| Bachelor's degree or higher | 50.1% |
| Average commute (minutes) | 28.5 |
| Households with kids under 18 | 26.4% |
| Moved in the past year | 12.9% |
| Below the poverty line | 7.1% |
| Broadband internet | 91.7% |
| Speak a non-English language at home | 13.2% |
Household income
| % of households | Value |
|---|---|
| <$10K | 2.6% |
| $10–15K | 2.4% |
| $15–25K | 4.6% |
| $25–35K | 3.5% |
| $35–50K | 6.5% |
| $50–75K | 11.3% |
| $75–100K | 16.0% |
| $100–150K | 20.0% |
| $150–200K | 12.6% |
| $200K+ | 20.5% |
Age
| % of all residents | Value |
|---|---|
| <10 | 9.3% |
| 10–19 | 11.3% |
| 20–24 | 6.2% |
| 25–34 | 15.8% |
| 35–44 | 14.3% |
| 45–54 | 12.3% |
| 55–64 | 12.6% |
| 65–74 | 10.6% |
| 75+ | 7.5% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 48.4% |
| Owned outright | 15.4% |
| Rented | 31.8% |
| Vacant | 4.4% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 38.4% |
| Townhome | 31.4% |
| 2–4 units | 7.6% |
| 5–19 units | 12.8% |
| 20+ units | 9.5% |
| Mobile / other | 0.2% |
Businesses in 21701
1,616 business establishments with 25,929 employees (ZIP Codes Business Patterns 2023).
- Professional, Scientific, and Technical Services: 278
- Retail Trade: 200
- Health Care and Social Assistance: 200
- Accommodation and Food Services: 161
- Other Services (except Public Administration): 151
- Finance and Insurance: 121
- Construction: 117
- Real Estate and Rental and Leasing: 77
EDDM carrier routes
21701 has 35 USPS carrier routes with 20,269 residential and 1,944 business mailboxes. Open the EDDM route map.
Carrier routes in 21701
21701 has 35 USPS carrier routes (20 city (C), 15 rural (R)) with 20,269 residential and 1,944 business mailboxes. Routes range from 259 homes (C011) to 1,142 homes (C029); the median route has 544 homes. The Census counted 18,651 households in 21701 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 10 |
| 500–749 | 18 |
| 750–999 | 6 |
| 1,000–1,499 | 1 |
| 1,500+ | 0 |
Best routes in 21701 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C034 — USPS business mailboxes 206, 263 homes
- Route C012 — USPS business mailboxes 156, 448 homes
- Route C037 — USPS business mailboxes 154, 549 homes
- Route C052 — USPS business mailboxes 146, 664 homes
- Route C009 — USPS business mailboxes 139, 506 homes
Select these 5 routes on the route map
Every carrier route in 21701
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C002 | City | 792 | 12 | $64,873 | — | — | — |
| C003 | City | 443 | 36 | $88,355 | — | — | — |
| C004 | City | 281 | 42 | $170,214 | — | — | — |
| C005 | City | 624 | 25 | $94,795 | — | — | — |
| C006 | City | 384 | 49 | $77,115 | — | — | — |
| C007 | City | 875 | 102 | $67,769 | — | — | — |
| C008 | City | 551 | 56 | $67,769 | — | — | — |
| C009 | City | 506 | 139 | $67,769 | — | — | — |
| C011 | City | 259 | 129 | $88,737 | — | — | — |
| C012 | City | 448 | 156 | $64,885 | — | — | — |
| C013 | City | 532 | 43 | $170,214 | — | — | — |
| C021 | City | 428 | 39 | $35,891 | — | — | — |
| C029 | City | 1,142 | 7 | $35,891 | — | — | — |
| C032 | City | 432 | 23 | $68,736 | — | — | — |
| C034 | City | 263 | 206 | $88,737 | — | — | — |
| C035 | City | 550 | 56 | $64,885 | — | — | — |
| C037 | City | 549 | 154 | $88,737 | — | — | — |
| C040 | City | 770 | 2 | $118,940 | — | — | — |
| C048 | City | 516 | 8 | $64,885 | — | — | — |
| C052 | City | 664 | 146 | $67,769 | — | — | — |
| R010 | Rural | 544 | 8 | $135,977 | — | — | — |
| R017 | Rural | 503 | 100 | $35,891 | — | — | — |
| R018 | Rural | 544 | 120 | $108,087 | — | — | — |
| R027 | Rural | 557 | 0 | $108,087 | — | — | — |
| R029 | Rural | 691 | 2 | $141,947 | — | — | — |
| R035 | Rural | 403 | 3 | $161,441 | — | — | — |
| R036 | Rural | 590 | 0 | $108,087 | — | — | — |
| R039 | Rural | 742 | 15 | $159,101 | — | — | — |
| R043 | Rural | 754 | 46 | $108,087 | — | — | — |
| R047 | Rural | 515 | 51 | $35,891 | — | — | — |
| R057 | Rural | 656 | 44 | $166,915 | — | — | — |
| R071 | Rural | 911 | 1 | $51,557 | — | — | — |
| R079 | Rural | 521 | 5 | $91,486 | — | — | — |
| R080 | Rural | 847 | 117 | $135,977 | — | — | — |
| R088 | Rural | 482 | 2 | $166,915 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 21701 on the EDDM route map.
How route demographics are estimated
Mailbox counts come from USPS; demographics are estimates
The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).
How a route gets its figures: the block-group length-share method
We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.
Margins of error
Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.
Different years
USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.
Why some routes show identical figures
Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.
Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Nearby ZIP codes
- 21793 — Walkersville town, MD (3.2 mi)
- 21774 — Linganore CDP, MD (3.9 mi)
- 21705 — Frederick city, MD (4.8 mi)
- 21762 — Libertytown CDP, MD (5.2 mi)
- 21702 — Frederick city, MD (6.4 mi)
- 21704 — Urbana CDP, MD (6.5 mi)
- 21798 — Woodsboro town, MD (6.8 mi)
- 21770 — Green Valley CDP, MD (7.6 mi)
Areas that include 21701
- Frederick, MD ZIP codes — 5 ZIP codes
- Spring Ridge, MD ZIP codes — 1 ZIP code
- Libertytown, MD ZIP codes — 3 ZIP codes
- Frederick County ZIP codes — 33 ZIP codes
- Maryland ZIP code data
Where it ranks
Mail every home in 21701
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 21701, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 21701 in?
- 21701 is a Frederick, MD mailing address. By land area, 29% lies inside Frederick, 7% lies inside Spring Ridge, 2% lies inside Libertytown and 2% lies inside Linganore; the rest is outside any Census-defined city or community.
- What county is 21701 in?
- 21701 is in Frederick County.
- What is the population of 21701?
- About 43,048 people (±1,539), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 39,629.
- What is the median household income in 21701?
- $106,577 (±$2,451), compared with $103,678 for Maryland as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 21701?
- 35 USPS carrier routes with 20,269 residential and 1,944 business mailboxes (22,204 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 21701?
- The closest, measured center to center: 21793 (3.2 mi, Walkersville), 21774 (3.9 mi, Linganore), 21705 (4.8 mi, Frederick), 21762 (5.2 mi, Libertytown), 21702 (6.4 mi, Frederick) and 21704 (6.5 mi, Urbana).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.