ZIP Code 21012
| ZIP Code | 21012 |
| City | ARNOLD |
| State | MD |
| Type | STANDARD |
| Post offices count | 1 (see all) |
| Total population | 23,536 (see all) |
Cities in ZIP Code 21012
Primary city: ARNOLD, MDPost offices
ARNOLD — Post Office™ 1521 RITCHIE HWY STE 100 ARNOLD, MD 21012-2708 MoreARNOLD — Post Office™1521 RITCHIE HWY STE 100 For facility accessibility, please call the Post Office. 1-800-ASK-USPS® (800-275-8777) Hours
Services at this Location Service hours may vary.
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Census data for ZIP Code 21012
Demographic and housing estimates in ZIP Code 21012
| Total population | 23,536 |
| Male | 11,549 |
| Female | 11,987 |
| Total population | 23,536 |
| Under 5 years | 1,421 |
| 5 to 9 years | 1,937 |
| 10 to 14 years | 1,953 |
| 15 to 19 years | 1,862 |
| 20 to 24 years | 1,052 |
| 25 to 34 years | 2,015 |
| 35 to 44 years | 3,645 |
| 45 to 54 years | 3,172 |
| 55 to 59 years | 1,887 |
| 60 to 64 years | 1,189 |
| 65 to 74 years | 2,201 |
| 75 to 84 years | 883 |
| 85 years and over | 319 |
| Median age (years) | 38.1 |
| Under 18 years | 6,670 |
| 16 years and over | 17,663 |
| 18 years and over | 16,866 |
| 21 years and over | 16,083 |
| 62 years and over | 4,082 |
| 65 years and over | 3,403 |
| Total population | 23,536 |
| One race | 21,847 |
| White | 19,593 |
| Black or African American | 1,211 |
| American Indian and Alaska Native | 33 |
| Asian | 824 |
| Native Hawaiian and Other Pacific Islander | 0 |
| Some other race | 186 |
| Two or more races | 1,689 |
| Citizen, VOTING AGE 18 and over population | 16,227 |
| Male Citizen, VOTING AGE 18 and over population | 7,678 |
| Female Citizen, VOTING AGE 18 and over population | 8,549 |
Social characteristics in ZIP Code 21012
| Total households | 8,136 |
| Family households (families) | 5,165 |
| Married-couple family | 512 |
| Male householder, no wife present, family | 859 |
| Female householder, no husband present, family | 589 |
| Nonfamily households | 1,600 |
| Average household size | 2,326 |
| Average family size | 2.87 |
Economic characteristics in ZIP Code 21012
| Total households | 8,136 |
| Less than $10,000 | 155 |
| $10,000 to $14,999 | 31 |
| $15,000 to $24,999 | 107 |
| $25,000 to $34,999 | 154 |
| $35,000 to $49,999 | 337 |
| $50,000 to $74,999 | 770 |
| $75,000 to $99,999 | 1,066 |
| $100,000 to $149,999 | 2,129 |
| $150,000 to $199,999 | 1,582 |
| $200,000 or more | 1,805 |
| Median household income (dollars) | 133,481 |
Housing characteristics in ZIP Code 21012
| Total housing units | 8,535 |
| Occupied housing units | 8,136 |
| Vacant housing units | 399 |
| Total housing units | 8,535 |
| 1-unit, detached | 6,099 |
| 1-unit, attached | 1,743 |
| 2 units | 13 |
| 3 or 4 units | 0 |
| 5 to 9 units | 336 |
| 10 to 19 units | 175 |
| 20 or more units | 127 |
| Mobile home | 34 |
| Boat, RV, van, etc. | 8 |
| Total housing units | 8,535 |
| Built 2014 or later | 0 |
| Built 2010 to 2013 | 332 |
| Built 2000 to 2009 | 236 |
| Built 1990 to 1999 | 1,341 |
| Built 1980 to 1989 | 2,390 |
| Built 1970 to 1979 | 2,356 |
| Built 1960 to 1969 | 757 |
| Built 1950 to 1959 | 625 |
| Built 1940 to 1949 | 284 |
| Built 1939 or earlier | 214 |
| Total housing units | 8,535 |
| 1 room | 38 |
| 2 rooms | 16 |
| 3 rooms | 119 |
| 4 rooms | 475 |
| 5 rooms | 580 |
| 6 rooms | 1,429 |
| 7 rooms | 1,745 |
| 8 rooms | 1,495 |
| 9 rooms or more | 2,638 |
| Median rooms | 7.4 |
| Total housing units | 8,535 |
| No bedroom | 38 |
| 1 bedroom | 194 |
| 2 bedrooms | 841 |
| 3 bedrooms | 2,935 |
| 4 bedrooms | 3,563 |
| 5 or more bedrooms | 964 |
| Occupied housing units | 8,136 |
| Owner-occupied | 6,926 |
| Renter-occupied | 1,210 |
| Average household size of owner-occupied unit | 2.84 |
| Average household size of renter-occupied unit | 3.08 |
| Occupied housing units | 8,136 |
| Moved in 2017 or later | 652 |
| Moved in 2015 to 2016 | 1,876 |
| Moved in 2010 to 2014 | 1,277 |
| Moved in 2000 to 2009 | 1,749 |
| Moved in 1990 to 1999 | 1,399 |
| Moved in 1989 and earlier | 1,183 |
| Owner-occupied units | 6,926 |
| Less than $50,000 | 56 |
| $50,000 to $99,999 | 19 |
| $100,000 to $149,999 | 56 |
| $150,000 to $199,999 | 148 |
| $200,000 to $299,999 | 630 |
| $300,000 to $499,999 | 3,261 |
| $500,000 to $999,999 | 2,337 |
| $1,000,000 or more | 419 |
| Median (dollars) | 458,800 |
| Owner-occupied units | 6,926 |
| Housing units with a mortgage | 5,542 |
| Housing units without a mortgage | 1,384 |
| Occupied units paying rent | 1,169 |
| Less than $500 | 0 |
| $500 to $999 | 63 |
| $1,000 to $1,499 | 111 |
| $1,500 to $1,999 | 534 |
| $2,000 to $2,499 | 451 |
| $2,500 to $2,999 | 6 |
| $3,000 or more | 4 |
| Median (dollars) | 1,884 |
| No rent paid | 41 |
Data is based on 2021 Census