Zip lookup · MD

21757
Keymar, Maryland.

Keymar, Frederick County, MD · Washington-Arlington-Alexandria, DC-VA-MD-WV metro · population 2,671

What it costs per month · 21757 $2,385/mo

to buy the typical home at today's mortgage rate — +$1,242 (+109%) since Jan 2020.

What the home itself did
1 year
Up $2,645 +1%
$451,671$454,316 since Sep 2025
5 years
Up $78,365 +21%
$375,951$454,316 since Sep 2021

Monthly payment to buy the typical home

Home value × that month's 30-year mortgage rate, 20% down, principal and interest. This is the line households feel: prices and rates compound each other.

$500 $1,000 $1,500 $2,000 2002 2006 2010 2014 2018 2022 2026 21757 $2,385 United States $1,922
$500 $1,000 $1,500 $2,000 2002 2010 2018 2026
  • 21757$2,385
  • United States$1,922

At the last five years' pace, a typical home here doubles in price every 18 years.

Typical home values in zip 21757 rose 0.6% over the past year — slower than the nation's +1.2%.

This zip spans 2 counties: Carroll County, MD 52% · Frederick County, MD 48%

Zillow also publishes an index for the city itself: Keymar, MD — measured over the city limits, which is a different area from this zip.

Typical home value $454,316 as of Sep 2026
+0.6%year on year

Typical home value — 21757

Mid-tier homes, smoothed and seasonally adjusted.

$200,000 $300,000 $400,000 $500,000 2018 2020 2022 2024 2026 21757 $454,316 Washington $569,857 United States $366,157
$200,000 $300,000 $400,000 $500,000 2018 2022 2026
  • 21757$454,316
  • Washington$569,857
  • United States$366,157

Within 20 miles

Showing 30 of 31 zips in range — sorting picks from all 31.

10 mi 20 mi 50 mi
Miles Zip City Population Rent Home value
4.3 21778 Rocky Ridge 745 — $440,138
4.7 21798 Woodsboro 2,928 — $500,713
5.5 21791 Union Bridge 5,340 — $444,900
6.8 21787 Taneytown 11,645 — $395,611
7.3 21727 Emmitsburg 6,052 $1,188 $368,546
8.2 21762 Libertytown 139 — $324,370
8.6 21788 Thurmont 11,654 $2,262 $391,478
8.8 21793 Walkersville 10,719 $2,000 $460,763
10.0 21776 New Windsor 6,261 — $481,505
11.2 21701 Frederick 43,048 $2,158 $443,257
12.3 21780 Sabillasville 2,159 — $405,225
12.5 21158 Westminster 22,083 $1,997 $466,583
13.2 21774 New Market 17,134 $2,821 $591,215
13.4 17340 Littlestown 11,405 $1,145 $339,563
13.4 21702 Frederick 49,605 $1,958 $451,936
13.6 17320 Fairfield 8,124 — $348,249
14.8 21719 Cascade 1,178 — $291,239
15.0 21771 Mount Airy 33,031 $2,562 $625,933
15.2 21157 Westminster 38,984 $1,619 $460,921
15.2 17214 Blue Ridge Summit 1,143 — $282,437
15.9 17325 Gettysburg 30,373 $1,432 $368,178
16.2 21773 Myersville 5,826 — $547,465
16.3 21783 Smithsburg 9,910 — $370,274
17.0 21770 Monrovia 8,751 — $652,546
18.2 21704 Frederick 20,006 $2,994 $644,613
18.3 21754 Ijamsville 8,156 — $680,004
19.1 17344 McSherrystown 3,719 — $246,885
19.4 21769 Middletown 11,965 $1,824 $558,052
19.5 21703 Frederick 41,960 $2,296 $410,271
19.9 17331 Hanover 56,443 $1,394 $295,339

Coordinates and population from SimpleMaps US Zips (Basic). Rent and home values from Zillow Research.