Real Estate Data API

21757 Keymar

9 active listings out of 1.1K total properties we track in ZIP 21757 (Keymar, MD) — listings, off-market homes, rentals, and full sales/tax history. Refreshed nightly.

Get this data → API docs
Active
9
Median
$400K
±0%
Sales (12mo)
33
Tracked
1.1K
Zoomed out

While you're here, take in the bigger picture — maps below show Maryland (statewide), not just 21757. Same company, same dataset, different resolution.

Get this data →
Key Numbers
Tracked
1.1K
Active
9
Median list
$400K
Sales (12mo)
33
Get this data →
Key Numbers
Tracked
1.1K
Active
9
Median list
$400K
Sales (12mo)
33
Get this data →
Key Numbers
Tracked
1.1K
Active
9
Median list
$400K
Sales (12mo)
33
Get this data →
Key Numbers
Tracked
1.1K
Active
9
Median list
$400K
Sales (12mo)
33
Get this data →
Key Numbers
Tracked
1.1K
Active
9
Median list
$400K
Sales (12mo)
33

Inventory breakdown

Distribution of the 9 currently-active listings in ZIP 21757. Full dataset covers 1.1K properties — listings, off-market homes, rentals, and full history.

Active by price range
Under $300K 3 (33.3%)
$300K–$500K 2 (22.2%)
$500K–$750K 1 (11.1%)
$750K–$1M 0 (0%)
$1M–$2M 2 (22.2%)
$2M+ 1 (11.1%)
Active by bedroom count
Studio/1 bd 0
2 bd 2
3 bd 4
4 bd 2
5+ bd 1
Active by property type
Single Family 9 (100%)
For Developers

Get Keymar 21757 data in your app

curl
request 
GET https://api.straply.com/v1/markets/zip/21757
Authorization: Bearer $STRAPLY_KEY
200 OK response 
{
  "zip": "21757",
  "total_tracked": 1123,
  "active": 9,
  "median_list": 399999
}
Get an API key Read the docs

ZIP 21757 · Keymar, MD real estate: market summary

As of June 2026, Straply tracks 1,123 homes in ZIP 21757 (Keymar, MD), with 9 active for sale at a median list price of $399,999 (~$236/sq ft). Notably, it has notably historic housing — 36% of homes predate 1940.

Median list price
$399,999
Median $/sq ft
$236
Active listings
9
Properties tracked
1,123

Frequently asked: ZIP 21757 · Keymar, MD real estate

What is the median home price in ZIP 21757?

The median list price in ZIP 21757 (Keymar, MD) is $399,999 (about $236 per square foot), based on 9 active listings tracked by Straply as of June 2026.

What price range are homes in ZIP 21757?

Active listings in ZIP 21757 (Keymar, MD) concentrate in: 33% under $300k and 22% $300k–$500k.

How many homes are for sale in ZIP 21757?

Straply is tracking 9 active listings in ZIP 21757 (Keymar, MD) out of 1,123 properties on record as of June 2026.

How old are the homes in ZIP 21757?

Most homes in ZIP 21757 (Keymar, MD) were built in the 1900s. About 34% were built after 1980, while 36% predate 1940. The newest tracked home dates to 2025.

What types of homes are in ZIP 21757?

ZIP 21757 (Keymar, MD) is mostly single-family homes (100% of listings).

How many bedrooms do homes in ZIP 21757 typically have?

The most common size in ZIP 21757 (Keymar, MD) is 3 bd.

Data as of June 2026. Source: Straply. For address-level history and programmatic access, use the Straply API.