| Back to United States. Population (2000): 23,511
Housing units: 9,045 Land area: 10.2 sq. mi. Water area: 0.0 sq. mi. White population: 20806 Black population: 1583 American Indian population: 39 Asian population: 535 Native Hawaiian and Other Pacific Islander population: 6 Some other race population: 175 Two or more races population: 367 Urban population: 23500 Rural population: 11 Median age: 32.9 Average household size: 2.69 Median household income (1999): $63212
 
Nearest zip codes: 21040, 21017, 21015, 21085, 21014, 21130.
Year house built:
- 1999 to March 2000: 170
- 1995 to 1998: 1541
- 1990 to 1994: 2638
- 1980 to 1989: 2984
- 1970 to 1979: 808
- 1960 to 1969: 438
- 1950 to 1959: 226
- 1940 to 1949: 125
- 1939 or earlier: 168
Bedrooms in owner-occupied houses in 21009:
- no bedroom: 11
- 1 bedrooms: 24
- 2 bedrooms: 1032
- 3 bedrooms: 3878
- 4 bedrooms: 2051
- 5 or more bedrooms: 276
Bedrooms in renter-occupied apartments and housing units:
- no bedroom: 19
- 1 bedrooms: 577
- 2 bedrooms: 567
- 3 bedrooms: 349
- 4 bedrooms: 22
- 5 or more bedrooms: 0
Vehicles available in 21009 zip code in owner-occupied houses:
- no vehicle: 104
- 1 vehicle: 1575
- 2 vehicles: 3978
- 3 vehicles: 1232
- 4 vehicles: 277
- 5 or more vehicles: 106
Vehicles available in renter-occupied housing units:
- no vehicle: 246
- 1 vehicle: 723
- 2 vehicles: 447
- 3 vehicles: 92
- 4 vehicles: 12
- 5 or more vehicles: 14
Estimate of home value of owner-occupied houses in 2000 in zip code 21009:
- 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: 9
- $35,000 to $39,999: 0
- $40,000 to $49,999: 9
- $50,000 to $59,999: 9
- $60,000 to $69,999: 11
- $70,000 to $79,999: 46
- $80,000 to $89,999: 233
- $90,000 to $99,999: 945
- $100,000 to $124,999: 1360
- $125,000 to $149,999: 1487
- $150,000 to $174,999: 886
- $175,000 to $199,999: 696
- $200,000 to $249,999: 596
- $250,000 to $299,999: 166
- $300,000 to $399,999: 114
- $400,000 to $499,999: 9
- $500,000 to $749,999: 19
- $750,000 to $999,999: 0
- $1,000,000 or more: 0
First ancestries reported:
- German: 4495
- Italian: 2827
- Irish: 2790
- Other groups: 2684
- English: 1698
- Polish: 1524
- United States or American: 1140
- Scottish: 366
- Scotch-Irish: 355
- French (except Basque): 220
- Dutch: 218
- Czech: 169
- Greek: 164
- Welsh: 162
- Russian: 127
- British: 125
- European: 121
- French Canadian: 103
- Lithuanian: 103
- Czechoslovakian: 95
- Subsaharan African:: 75
- Swedish: 74
- Ukrainian: 71
- Norwegian: 69
- Slovak: 68
- Arab:: 67
- African: 60
- Austrian: 60
- Turkish: 58
- Canadian: 50
- Egyptian: 49
- West Indian (excluding Hispanic groups):: 44
- Eastern European: 41
- Australian: 41
- Hungarian: 39
- Jamaican: 39
- Croatian: 33
- Celtic: 32
- Armenian: 28
- Finnish: 21
- Scandinavian: 20
- Portuguese: 20
- Lebanese: 18
- Danish: 18
- Serbian: 15
- Cape Verdean: 15
- Swiss: 12
- Pennsylvania German: 8
- Estonian: 7
- Yugoslavian: 7
- Belgian: 7
- British West Indian: 5
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