| Back to United States. Population (2000): 97,300
Housing units: 22,032 Land area: 9.3 sq. mi. Water area: 0.0 sq. mi. White population: 35949 Black population: 5116 American Indian population: 1261 Asian population: 4261 Native Hawaiian and Other Pacific Islander population: 107 Some other race population: 46016 Two or more races population: 4590 Urban population: 97300 Rural population: 0 Median age: 26.6 Average household size: 4.54 Median household income (1999): $39225
 
Nearest zip codes: 91340, 91402, 91345, 91605, 91342, 91352.
Year house built:
- 1999 to March 2000: 47
- 1995 to 1998: 256
- 1990 to 1994: 816
- 1980 to 1989: 2680
- 1970 to 1979: 2372
- 1960 to 1969: 3745
- 1950 to 1959: 8866
- 1940 to 1949: 2412
- 1939 or earlier: 902
Bedrooms in owner-occupied houses in 91331:
- no bedroom: 1216
- 1 bedrooms: 1774
- 2 bedrooms: 3752
- 3 bedrooms: 5231
- 4 bedrooms: 1435
- 5 or more bedrooms: 219
Bedrooms in renter-occupied apartments and housing units:
- no bedroom: 1500
- 1 bedrooms: 2462
- 2 bedrooms: 2075
- 3 bedrooms: 1460
- 4 bedrooms: 209
- 5 or more bedrooms: 65
Vehicles available in 91331 zip code in owner-occupied houses:
- no vehicle: 730
- 1 vehicle: 3299
- 2 vehicles: 4987
- 3 vehicles: 2844
- 4 vehicles: 1155
- 5 or more vehicles: 612
Vehicles available in renter-occupied housing units:
- no vehicle: 1501
- 1 vehicle: 3012
- 2 vehicles: 2255
- 3 vehicles: 672
- 4 vehicles: 232
- 5 or more vehicles: 99
Estimate of home value of owner-occupied houses in 2000 in zip code 91331:
- Less than $10,000: 0
- $10,000 to $14,999: 0
- $15,000 to $19,999: 29
- $20,000 to $24,999: 17
- $25,000 to $29,999: 46
- $30,000 to $34,999: 10
- $35,000 to $39,999: 18
- $40,000 to $49,999: 8
- $50,000 to $59,999: 29
- $60,000 to $69,999: 78
- $70,000 to $79,999: 120
- $80,000 to $89,999: 273
- $90,000 to $99,999: 288
- $100,000 to $124,999: 1568
- $125,000 to $149,999: 4371
- $150,000 to $174,999: 3507
- $175,000 to $199,999: 1362
- $200,000 to $249,999: 361
- $250,000 to $299,999: 44
- $300,000 to $399,999: 31
- $400,000 to $499,999: 23
- $500,000 to $749,999: 23
- $750,000 to $999,999: 18
- $1,000,000 or more: 0
First ancestries reported:
- Other groups: 79015
- United States or American: 1612
- German: 743
- Italian: 544
- English: 480
- Irish: 452
- Subsaharan African:: 392
- African: 362
- Polish: 284
- French (except Basque): 264
- Armenian: 243
- European: 186
- Russian: 184
- Arab:: 129
- West Indian (excluding Hispanic groups):: 107
- Scotch-Irish: 94
- Scottish: 89
- Dutch: 79
- Egyptian: 70
- Norwegian: 66
- Belizean: 64
- Hungarian: 55
- Austrian: 54
- British: 53
- Swedish: 52
- French Canadian: 52
- Canadian: 46
- Iranian: 45
- Basque: 33
- Danish: 31
- Welsh: 29
- Greek: 28
- Jordanian: 26
- Jamaican: 25
- Croatian: 25
- Czech: 24
- Ukrainian: 23
- Swiss: 22
- Nigerian: 22
- Romanian: 19
- West Indian: 18
- Portuguese: 17
- Slovak: 17
- Assyrian/Chaldean/Syriac: 12
- Icelander: 12
- Arab/Arabic: 12
- Israeli: 12
- Czechoslovakian: 10
- Other Arab: 9
- Lebanese: 9
- Afghan: 8
- Latvian: 8
- Lithuanian: 7
- Northern European: 7
- Slavic: 7
- Finnish: 7
- Belgian: 6
- Kenyan: 6
- Scandinavian: 6
- Celtic: 5
- Palestinian: 3
- Cape Verdean: 2
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