Median household income (1999): $76,309
Estimated median household income in 2005: $85,959
| This zip code | $85,959 | | Iowa: | $43,609 |
Nearest zip codes: 50322, 50310, 50111, 50311, 50325, 50323.
Housing units in zip code 50131 with a mortgage: 1,935 (200 second mortgage, 316 home equity loan, 21 both second mortgage and home equity loan)
Houses without a mortgage: 474
Median monthly owner costs for units with a mortgage: $1,490
Median monthly owner costs for units without a mortgage: $429
Residents with income below the poverty level in 1999:
| This zip code: | 4.0% | | Whole state: | 9.1% |
Residents with income below 50% of the poverty level in 1999:
| This zip code: | 1.6% | | Whole state: | 3.8% |
Median number of rooms in houses and condos:
| Here: | 7.4 | | State: | 6.3 |
Median number of rooms in apartments:
| Here: | 3.7 | | State: | 4.2 |
Year house built:
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- 1999 to March 2000: 334
- 1995 to 1998: 767
- 1990 to 1994: 519
- 1980 to 1989: 1,033
- 1970 to 1979: 346
- 1960 to 1969: 261
- 1950 to 1959: 74
- 1940 to 1949: 147
- 1939 or earlier: 79
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Bedrooms in owner-occupied houses in Johnston, IA (50131):
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- no bedroom: 0
- 1 bedrooms: 15
- 2 bedrooms: 335
- 3 bedrooms: 1,134
- 4 bedrooms: 926
- 5 or more bedrooms: 85
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Bedrooms in renter-occupied apartments and housing units:
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- no bedroom: 33
- 1 bedrooms: 342
- 2 bedrooms: 434
- 3 bedrooms: 16
- 4 bedrooms: 22
- 5 or more bedrooms: 0
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Vehicles available in 50131 zip code in owner-occupied houses/condos:
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- no vehicle: 13
- 1 vehicle: 365
- 2 vehicles: 1,550
- 3 vehicles: 443
- 4 vehicles: 91
- 5 or more vehicles: 33
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Vehicles available in renter-occupied apartments:
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- no vehicle: 80
- 1 vehicle: 426
- 2 vehicles: 321
- 3 vehicles: 20
- 4 vehicles: 0
- 5 or more vehicles: 0
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Estimated household income distribution in 2005:

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Estimate of home value of owner-occupied houses/condos in 2005 in zip code 50131:
- $30,000 to $34,999: 8
- $40,000 to $49,999: 10
- $50,000 to $59,999: 20
- $60,000 to $69,999: 10
- $70,000 to $79,999: 14
- $80,000 to $89,999: 31
- $90,000 to $99,999: 56
- $100,000 to $124,999: 211
- $125,000 to $149,999: 394
- $150,000 to $174,999: 232
- $175,000 to $199,999: 363
- $200,000 to $249,999: 422
- $250,000 to $299,999: 295
- $300,000 to $399,999: 245
- $400,000 to $499,999: 68
- $500,000 to $749,999: 30
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Rent paid by renters in 2000 in zip code 50131:
- $100 to $149: 16
- $150 to $199: 21
- $200 to $249: 20
- $250 to $299: 12
- $350 to $399: 22
- $400 to $449: 107
- $450 to $499: 38
- $500 to $549: 18
- $550 to $599: 38
- $600 to $649: 60
- $650 to $699: 151
- $700 to $749: 42
- $750 to $799: 129
- $800 to $899: 103
- $1,250 to $1,499: 32
- $1,500 to $1,999: 18
- No cash rent: 11
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Median price asked for vacant for-sale houses in 2000: $118,500
Estimated median house (or condo) value in 2005 for: - White Non-Hispanic householders: $260,590
- Black or African American householders: $129,545
- Asian householders: $223,363
Housing units in structures:
- One, detached: 2,307
- One, attached: 322
- Two: 67
- 3 or 4: 145
- 5 to 9: 291
- 10 to 19: 171
- 20 to 49: 19
- 50 or more: 238

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Means of transportation to work
- Drove a car alone: 4,352 (91%)
- Carpooled: 276 (6%)
- Bus or trolley bus: 20 (0%)
- Bicycle: 9 (0%)
- Walked: 40 (1%)
- Other means: 12 (0%)
- Worked at home: 99 (2%)
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Travel time to work
- Less than 5 minutes: 220
- 5 to 9 minutes: 735
- 10 to 14 minutes: 774
- 15 to 19 minutes: 840
- 20 to 24 minutes: 924
- 25 to 29 minutes: 530
- 30 to 34 minutes: 478
- 35 to 39 minutes: 13
- 40 to 44 minutes: 44
- 45 to 59 minutes: 73
- 60 to 89 minutes: 34
- 90 or more minutes: 44
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Percentage of zip code residents living and working in this county: 93.5%
Household type by relationship
Households: 8,750
- In family households: 7,643 (1,974 male householders, 481 female householders)
2,129 spouses, 2,896 children (2,698 natural, 99 adopted, 99 stepchildren), 15 grandchildren, 0 brothers or sisters, 51 parents, 20 other relatives, 77 non-relatives
- In nonfamily households: 1,107 (240 male householders (221 living alone)), 670 female householders (539 living alone)), 197 nonrelatives
- In group quarters: 270 (208 institutionalized population)
Size of family households: 1,021 2-persons, 493 3-persons, 621 4-persons, 242 5-persons, 70 6-persons, 8 7-or-more-persons.
Size of nonfamily households: 760 1-person, 131 2-persons, 19 3-persons.
2,244 married couples with children.
236 single-parent households (71 men, 165 women).
94.8% of residents of 50131 zip code speak English at home.
1.4% of residents speak Spanish at home (58% very well, 42% not well).
1.1% of residents speak other Indo-European language at home (80% very well, 20% well).
2.7% of residents speak Asian or Pacific Island language at home (69% very well, 25% well, 3% not well, 3% not at all).
Foreign born population: 324 (3.6%)
(58.0% of them are naturalized citizens)
| This zip code: | 3.6% | | Whole state: | 3.1% |
Most common places of birth for the foreign-born residents:
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- China, excluding Hong Kong and Taiwan (30%)
- United Kingdom (17%)
- Russia (10%)
- Korea (10%)
- Canada (10%)
- India (6%)
- Australia (6%)
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Year of entry for the foreign-born population
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- 1995 to March 2000: 43
- 1990 to 1994: 59
- 1985 to 1989: 78
- 1980 to 1984: 15
- 1975 to 1979: 10
- 1970 to 1974: 33
- 1970 to 1974: 16
- 1965 to 1969: 70
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First ancestries reported:
- German: 2804
- Irish: 747
- English: 736
- Other groups: 560
- Norwegian: 362
- Italian: 315
- French (except Basque): 260
- Danish: 231
- Swedish: 227
- United States or American: 225
- Dutch: 220
- Scottish: 147
- Scotch-Irish: 116
- Welsh: 98
- Polish: 89
- European: 71
- Czech: 58
- Czechoslovakian: 42
- Russian: 41
- Swiss: 38
- Greek: 32
- Lithuanian: 31
- West Indian (excluding Hispanic groups):: 29
- Jamaican: 29
- Belgian: 29
- British: 27
- Subsaharan African:: 24
- African: 24
- French Canadian: 19
- Canadian: 18
- Australian: 18
- Scandinavian: 14
- Pennsylvania German: 11
- Ukrainian: 10
- Arab:: 8
- Basque: 8
- Lebanese: 8



Housing units lacking complete kitchen facilities: 3%
Most commonly used house heating fuel:
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- Utility gas (81%)
- Electricity (16%)
- Bottled, tank, or LP gas (2%)
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Place of birth for U.S.-born residents:
- This state: 6263
- Northeast: 263
- Midwest: 1304
- South: 345
- West: 427
40% of the 50131 zip code residents lived in the same house 5 years ago.
Out of people who lived in different houses, 58% lived in this county.
Out of people who lived in different counties, 47% lived in Iowa.
Population in 1990: 4,945. Population change in the 1990s: +4,025 (+81.4%).
Year Householders Moved Into Unit:
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Private vs. public school enrollment:
Students in private schools in grades 1 to 8 (elementary and middle school): 102
| Here: | 8.4% | | Iowa: | 10.8% |
Students in private schools in grades 9 to 12 (high school): 41
| Here: | 6.5% | | Iowa: | 7.1% |
Students in private undergraduate colleges: 9
| Here: | 5.4% | | Iowa: | 25.4% |
School Enrollment by Level of School
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Top industries in this zip code by the number of employees in 2005:
- Management of Companies and Enterprises: Corporate, Subsidiary, and Regional Managing Offices (250-499 employees: 1 establishment, 100-249 employees: 3 establishments, 50-99 employees: 1 establishment, 20-49 employees: 2 establishments, 10-19 employees: 2 establishments)
- Finance and Insurance: Sales Financing (500-999: 1, 10-19: 1, 1-4: 1)
- Health Care and Social Assistance: Residential Mental Retardation Facilities (500-999: 1)
- Professional, Scientific, and Technical Services: Research and Development in the Physical, Engineering, and Life Sciences (250-499: 1, 50-99: 2, 5-9: 2)
- Accommodation and Food Services: Full-Service Restaurants (50-99: 4, 20-49: 3, 10-19: 3, 5-9: 1, 1-4: 4)
- Health Care and Social Assistance: Continuing Care Retirement Communities (250-499: 1, 20-49: 1)
- Information: Data Processing, Hosting, and Related Services (250-499: 1, 1-4: 1)
- Finance and Insurance: Financial Transactions Processing, Reserve, and Clearinghouse Activities (250-499: 1)
- Health Care and Social Assistance: Nursing Care Facilities (100-249: 1, 50-99: 1)
Age and Sex of Sensory-Disabled Residents (Noninstitutionalized)
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Age and Sex of Physically-Disabled Residents (Noninstitutionalized)
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Age and Sex of Mentally-Disabled Residents (Noninstitutionalized)
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Age and Sex of Self-Care Disabled Residents (Noninstitutionalized)
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Age and Sex of Go-Outside-Home Disabled Residents (Noninstitutionalized)
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Age and Sex of Residents with Employment Disability (Noninstitutionalized)
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People in group quarters
- 151 people in nursing homes
- 68 people in unknown juvenile institutions
- 43 people in other noninstitutional group quarters
- 7 people in homes for the mentally retarded
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