| Back to United States. City: Knoxville, IA Population (2000): 11,614
Housing units: 4,891 Land area: 169.4 sq. mi. Water area: 0.1 sq. mi. White population: 11307 Black population: 107 American Indian population: 28 Asian population: 48 Native Hawaiian and Other Pacific Islander population: 5 Some other race population: 34 Two or more races population: 85 Urban population: 7778 Rural population: 3836 Median age: 39.3 Average household size: 2.42 Median household income (1999): $38919
 
Nearest zip codes: 50057, 50214, 50062, 50119, 50225, 50116.
Year house built:
- 1999 to March 2000: 98
- 1995 to 1998: 254
- 1990 to 1994: 281
- 1980 to 1989: 381
- 1970 to 1979: 1055
- 1960 to 1969: 484
- 1950 to 1959: 526
- 1940 to 1949: 353
- 1939 or earlier: 1478
Bedrooms in owner-occupied houses in Knoxville, IA (50138):
- no bedroom: 2
- 1 bedrooms: 105
- 2 bedrooms: 938
- 3 bedrooms: 1720
- 4 bedrooms: 543
- 5 or more bedrooms: 158
Bedrooms in renter-occupied apartments and housing units:
- no bedroom: 40
- 1 bedrooms: 332
- 2 bedrooms: 479
- 3 bedrooms: 218
- 4 bedrooms: 84
- 5 or more bedrooms: 6
Vehicles available in 50138 zip code in owner-occupied houses:
- no vehicle: 83
- 1 vehicle: 880
- 2 vehicles: 1444
- 3 vehicles: 641
- 4 vehicles: 311
- 5 or more vehicles: 107
Vehicles available in renter-occupied housing units:
- no vehicle: 299
- 1 vehicle: 458
- 2 vehicles: 293
- 3 vehicles: 95
- 4 vehicles: 14
- 5 or more vehicles: 0
Estimate of home value of owner-occupied houses in 2000 in zip code 50138:
- Less than $10,000: 29
- $10,000 to $14,999: 0
- $15,000 to $19,999: 33
- $20,000 to $24,999: 72
- $25,000 to $29,999: 72
- $30,000 to $34,999: 52
- $35,000 to $39,999: 43
- $40,000 to $49,999: 259
- $50,000 to $59,999: 346
- $60,000 to $69,999: 262
- $70,000 to $79,999: 368
- $80,000 to $89,999: 293
- $90,000 to $99,999: 216
- $100,000 to $124,999: 361
- $125,000 to $149,999: 119
- $150,000 to $174,999: 62
- $175,000 to $199,999: 69
- $200,000 to $249,999: 2
- $250,000 to $299,999: 41
- $300,000 to $399,999: 0
- $400,000 to $499,999: 0
- $500,000 to $749,999: 0
- $750,000 to $999,999: 0
- $1,000,000 or more: 0
First ancestries reported:
- German: 1915
- Irish: 1100
- English: 1075
- United States or American: 1055
- Dutch: 856
- Other groups: 543
- Italian: 238
- French (except Basque): 185
- Scotch-Irish: 180
- Swedish: 173
- Norwegian: 148
- Scottish: 129
- European: 90
- Northern European: 77
- Danish: 74
- Czech: 72
- Welsh: 62
- Polish: 41
- French Canadian: 32
- Pennsylvania German: 23
- Yugoslavian: 22
- Belgian: 22
- Czechoslovakian: 15
- Canadian: 14
- Austrian: 14
- British: 13
- Croatian: 12
- Greek: 9
- Scandinavian: 8
- Acadian/Cajun: 7
- Subsaharan African:: 5
- African: 5
- Luxemburger: 5
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