| Polk County, IA | (Not rural) | ||
| Change | |||
| 1980 | 1990 | 1980-90 | |
| County Population | 303,170 | 327,140 | 8% |
| %White | 93% | 93% | -1% |
| %Black | 5% | 4% | 0% |
| %Hispanic | 1% | 2% | 0% |
| %Under 18 | 28% | 25% | -3% |
| %65 years and over | 10% | 11% | 1% |
| %Under 6 | 9% | 9% | 0% |
| %Foreign Born | 1% | 2% | 2% |
| Education (% pop over 25) | |||
| % 0-8 years | 9% | 4% | -4% |
| % 9-11 years | 13% | 10% | -2% |
| %Completed H.S. | 42% | 33% | -9% |
| %Some College | 18% | 21% | 3% |
| %Bachelors or Graduate Degree | 19% | 24% | 5% |
| Persons over 25 | 177,501 | 209,165 | 18% |
| H.S. Dropout Rate | 12% | 10% | -2% |
| Labor Market Structure | |||
| Employed Persons | 152,451 | 176,499 | 16% |
| %Operators, Nonfarm Laborers and Service | 26% | 24% | -2% |
| %Professional & Technical | 15% | 17% | 2% |
| %Managers & Administrators | 13% | 14% | 1% |
| %Sales Workers | 12% | 14% | 2% |
| %Clerical | 23% | 22% | -1% |
| %Craft Workers | 10% | 8% | -2% |
| %Operators | 10% | 8% | -2% |
| %Nonfarm Laborers | 4% | 4% | 0% |
| %Service Workers | 13% | 13% | 0% |
| %Farm Workers | 1% | 1% | 0% |
| %Males Working less than 26 Weeks | 25% | 25% | 0% |
| Males 16 and Over | 107,031 | 117,569 | 10% |
| Poverty and Welfare | |||
| %Persons in Impoverished Families | 8% | 9% | 1% |
| %Whites in Poverty | 7% | 8% | 1% |
| %Blacks in Poverty | 24% | 30% | 6% |
| %Hispanics in Poverty | 15% | 15% | 0% |
| %Households Receiving Welfare or PA | 6% | 5% | -1% |
| Income | |||
| Aggregate Income | $2,029,799,835 | $3,921,718,765 | 93% |
| Number of Families | 79,858 | 86,394 | 8% |
| Average Family Income | $25,418 | $45,393 | 79% |
| Aggregate Wage and Salary Income | $1,975,677,395 | $3,860,801,978 | 95% |
| Wage and Salary Households | 95,728 | 105,907 | 11% |
| Average Wage and Salary Income | $20,638 | $36,455 | 77% |
| Aggregate Self-Employed Income | $164,024,775 | $280,048,707 | 71% |
| Self-Employed Households | 13,427 | 18,066 | 35% |
| Average Self-Employed Income | $12,216 | $15,501 | 27% |
| Aggregate Earned Income | $2,129,343,475 | $4,140,850,685 | 94% |
| Earned Income Households | 98,362 | 108,670 | 10% |
| Average Earned Income | $21,648 | $38,105 | 76% |
| Average Welfare Income per Household | $2,761 | $3,877 | 40% |
| Households Grouped by Income Level | |||
| Income Under $5,000 | 11,261 | 5,554 | -51% |
| Income of $5,000-9,999 | 16,312 | 9,867 | -40% |
| Income of $10,000-14,999 | 16,677 | 11,049 | -34% |
| Income of $15,000-24,999 | 33,172 | 23,390 | -29% |
| Income of $25,000-49,999 | 32,150 | 49,200 | 53% |
| Income over $50,000 | 5,408 | 30,258 | 460% |
| Source: U.S. Census | |||
| Last Update: 7/8/97 |