| Back to United States. Population (2000): 4,061
Housing units: 1,321 Land area: 16.2 sq. mi. Water area: 0.0 sq. mi. White population: 3756 Black population: 165 American Indian population: 9 Asian population: 80 Native Hawaiian and Other Pacific Islander population: 3 Some other race population: 14 Two or more races population: 34 Urban population: 2227 Rural population: 1834 Median age: 36.8 Average household size: 3.13 Median household income (1999): $80765
 
Nearest zip codes: 21784, 21163, 21794, 21042, 21133, 21723.
Year house built:
- 1999 to March 2000: 70
- 1995 to 1998: 152
- 1990 to 1994: 226
- 1980 to 1989: 344
- 1970 to 1979: 222
- 1960 to 1969: 182
- 1950 to 1959: 132
- 1940 to 1949: 30
- 1939 or earlier: 14
Bedrooms in owner-occupied houses in 21104:
- no bedroom: 8
- 1 bedrooms: 7
- 2 bedrooms: 51
- 3 bedrooms: 596
- 4 bedrooms: 528
- 5 or more bedrooms: 80
Bedrooms in renter-occupied apartments and housing units:
- no bedroom: 0
- 1 bedrooms: 26
- 2 bedrooms: 0
- 3 bedrooms: 17
- 4 bedrooms: 11
- 5 or more bedrooms: 11
Vehicles available in 21104 zip code in owner-occupied houses:
- no vehicle: 59
- 1 vehicle: 106
- 2 vehicles: 664
- 3 vehicles: 261
- 4 vehicles: 119
- 5 or more vehicles: 61
Vehicles available in renter-occupied housing units:
- no vehicle: 0
- 1 vehicle: 17
- 2 vehicles: 37
- 3 vehicles: 0
- 4 vehicles: 11
- 5 or more vehicles: 0
Estimate of home value of owner-occupied houses in 2000 in zip code 21104:
- Less than $10,000: 0
- $10,000 to $14,999: 0
- $15,000 to $19,999: 0
- $20,000 to $24,999: 0
- $25,000 to $29,999: 0
- $30,000 to $34,999: 0
- $35,000 to $39,999: 0
- $40,000 to $49,999: 0
- $50,000 to $59,999: 0
- $60,000 to $69,999: 0
- $70,000 to $79,999: 0
- $80,000 to $89,999: 0
- $90,000 to $99,999: 14
- $100,000 to $124,999: 14
- $125,000 to $149,999: 150
- $150,000 to $174,999: 187
- $175,000 to $199,999: 194
- $200,000 to $249,999: 269
- $250,000 to $299,999: 174
- $300,000 to $399,999: 142
- $400,000 to $499,999: 51
- $500,000 to $749,999: 20
- $750,000 to $999,999: 0
- $1,000,000 or more: 8
First ancestries reported:
- German: 785
- Irish: 400
- United States or American: 395
- English: 376
- Italian: 358
- Other groups: 229
- Polish: 182
- French (except Basque): 128
- Scotch-Irish: 87
- Russian: 66
- Dutch: 39
- African: 33
- Subsaharan African:: 33
- Czech: 28
- Hungarian: 27
- French Canadian: 26
- Welsh: 24
- Greek: 23
- European: 21
- Czechoslovakian: 19
- British: 18
- Swiss: 16
- Scottish: 11
- Arab:: 10
- Syrian: 10
- Canadian: 9
- Ukrainian: 9
- Norwegian: 8
- Portuguese: 7
- Slovak: 7
- Austrian: 6
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