21778 Information
All zip codes in Rocky Ridge MD
Rocky Ridge Info
Maryland State
USA
Zip Code
21778
City
Rocky Ridge
State
Maryland (MD)
City Alias Name(s)
ROCKY RIDGE*
County
FREDERICK
,
Metro Area
Washington Arlington Alexandria, DC VA MD WV
Region
South
Division
South Atlantic
Geo Coordinates
39.611768, -77.333956
*USPS accepts this alias for mailing purposes
Population
1,129
Census 2010:
1,094
Estimated:
1,129
Growth:
3.10%
White
1,077
94.97%
Hispanic
24
2.12%
Asian
13
1.15%
Other
10
0.88%
Indian
5
0.44%
Hawaiian
3
0.26%
Black
2
0.18%
Gender and Age
Females
550
50.27
%
Males
544
49.73
%
Median age
45.10
Median age for females
46.50
Median age for males
43.80
Households
Total households
409
Persons per household
2.67
Income per household
$49,375.00
Time
Time zone(s)
Eastern Time Zone (US and Canada), EST. GMT-5
Day light saving
Yes
Area Codes
301
Zip Codes in
Rocky Ridge Maryland
21778
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Business in Rocky Ridge
Restaurants
Plumbers
Electricians
Auto Repair
Doctors
Dentists
Lawyers
Real Estate Agents
Beauty Salons
Veterinarians