| Index | Spencer | Iowa | National |
| Income per capita | $29,129 | $28,872 | $29,829 |
| Median household income | $45,224 | $54,570 | $55,322 |
| Median income owner occupied | $65,547 | $66,527 | $70,586 |
| Median income renter occupied | $23,295 | $30,828 | $35,192 |
| Median earnings male | $38,064 | $37,409 | $36,919 |
| Median earnings female | $27,538 | $25,115 | $26,250 |
| Unemployment rate | 3.6% | 3.1% | 4.7% |
| Poverty level | 12.3% | 12.3% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 10.6% | 10.6% |
| Manufacturing sector | 12.2% | 12.2% |
| Financial & insurance services | 3.1% | 3.1% |
| Wholesale & retail services | 24.2% | 24.2% |
| Public administration | 2.0% | 2.0% |
| Transportation, warehousing & utilities | 8.8% | 8.8% |
| Education, health & social services | 18.5% | 18.5% |
| Other | 17.7% | 17.7% |
| City | Population | Household Income | National Avg. |
| Fostoria, IA | 180 | $75,625 | 36.7% |
| West Okoboji, IA | 345 | $70,625 | 27.7% |
| Dickens, IA | 206 | $61,250 | 10.7% |
| Webb, IA | 181 | $57,857 | 4.6% |
| Milford, IA | 3,015 | $54,375 | 1.7% |
| Spencer, IA | 11,038 | $45,224 | 18.3% |
| City | Population | Household Income | National Avg. |
| Franklin Lakes, NJ | 11,044 | $178,794 | 223.2% |
| Ontario, OR | 11,031 | $35,917 | 35.1% |
| Middle Island, NY | 11,030 | $75,545 | 36.6% |
| Munhall, PA | 11,049 | $42,368 | 23.4% |
| Holbrook, MA | 11,051 | $79,718 | 44.1% |
| Spencer, IA | 11,038 | $45,224 | 18.3% |