21012 ZIP Code: Living in Arnold, MD
Updated November 2026 · Data: U.S. Census Bureau, American Community Survey 2020–2024
ZIP code 21012 is in Anne Arundel County, Maryland, and covers Arnold, Broadneck (part) and Cape St. Claire (part). The Broadneck peninsula between the Magothy and Severn rivers, home to Anne Arundel Community College and many water-privileged neighborhoods. About 22,570 people live in the 21012 ZIP code area.
21012 at a glance
Figures are Census estimates for ZIP Code Tabulation Area 21012, which closely follows the postal ZIP code. Estimates for smaller areas have wider margins of error.
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Neighborhoods and communities in 21012
The 21012 ZIP code includes Arnold, Broadneck (part) and Cape St. Claire (part). ZIP code lines don’t always match neighborhood or school boundaries, so confirm the details for any specific address.
Homes in 21012: what the housing looks like
Housing in 21012 is mostly single-family detached homes. Most homes were built before 2000; about 9% date from 2000 or later. About 86% of occupied homes are lived in by their owners, which is higher than the Maryland average of about 67%.
| Type of home | Share of homes in 21012 |
|---|---|
| Single-family detached | 72% |
| Townhomes and rowhomes (attached) | 20% |
| 2–4 unit buildings | 0% |
| Buildings with 5+ units (apartments, condos) | 7% |
Share of all housing units, ACS 2020–2024. 8,542 housing units in total.
Commuting from 21012
Workers living in 21012 average a 28.2-minute commute. About 22.4% work from home. Here is how far the center of the 21012 ZIP code is from major job centers and travel hubs. These are straight-line distances; drive times depend on route and traffic.
| Destination | Distance |
|---|---|
| Downtown Baltimore | 18 miles |
| Washington, D.C. | 31 miles |
| BWI Airport | 13 miles |
| Annapolis | 5 miles |
| Fort Meade | 14 miles |
| Columbia Town Center | 23 miles |
| Towson | 25 miles |
Living in Anne Arundel County: what to know
Annapolis is the county’s only incorporated city and has its own city taxes and services; the rest of Anne Arundel is governed by the county. With more than 500 miles of shoreline, many homes here are waterfront or water-privileged, which can bring critical area rules, pier permits and flood insurance questions.
Public schools in 21012 are run by Anne Arundel County Public Schools. Assignments go by street address, not ZIP code, so use the district’s school locator for a specific home. To compare schools, see the Maryland State Department of Education Report Card.
For taxes, commuting and lifestyle across the county, read our Anne Arundel County relocation guide. For parks and trails, see Anne Arundel County parks.
ZIP codes near 21012
- 21409 – Annapolis
- 21056 – Gibson Island
- 21146 – Severna Park
- 21122 – Pasadena
- 21401 – Annapolis
- 21032 – Crownsville
Looking at homes in 21012?
See every home for sale in this ZIP code, updated throughout the day, or ask a local agent about the neighborhoods here.
21012 ZIP code: frequently asked questions
What county is ZIP code 21012 in?
ZIP code 21012 is in Anne Arundel County, Maryland.
What neighborhoods are in the 21012 ZIP code?
The 21012 ZIP code includes Arnold, Broadneck (part) and Cape St. Claire (part).
What is the median home value in 21012?
The median value of owner-occupied homes in 21012 is about $563,800, according to Census American Community Survey estimates for 2020–2024. Current asking prices can differ, so check active listings for today’s market.
How far is 21012 from Baltimore and Washington, D.C.?
The center of the 21012 ZIP code is about 18 miles from downtown Baltimore and 31 miles from Washington, D.C., in a straight line. Drive times vary with traffic.
Where can I see homes for sale in 21012?
You can see all current homes for sale in 21012 on GreatestMoves.com, our home search site, at https://www.greatestmoves.com/zip-codes/21012/.
Sources: U.S. Census Bureau, American Community Survey 5-year estimates 2020–2024 (tables DP03, DP04, DP05) for ZCTA 21012; U.S. Census Bureau TIGERweb ZCTA boundaries. Distances are calculated from the ZCTA’s internal point.