| Index | Plymouth | Iowa | National |
| Income per capita | $39,166 | $42,672 | $44,883 |
| Median household income | $93,145 | $81,387 | $81,333 |
| Median income owner occupied | $101,256 | $98,724 | $106,172 |
| Median income renter occupied | $89,803 | $45,890 | $52,080 |
| Median earnings male | $63,674 | $54,047 | $54,343 |
| Median earnings female | $46,739 | $36,462 | $38,439 |
| Unemployment rate | 0.3% | 3.2% | 4.9% |
| Poverty level | 6.3% | 12.3% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 18.4% | 18.4% |
| Manufacturing sector | 24.0% | 24.0% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 16.0% | 16.0% |
| Public administration | 3.2% | 3.2% |
| Transportation, warehousing & utilities | 14.4% | 14.4% |
| Education, health & social services | 0.8% | 0.8% |
| Other | 21.6% | 21.6% |
| City | Population | Household Income | National Avg. |
| Manly, IA | 1,533 | $97,968 | 20.5% |
| St. Ansgar, IA | 1,176 | $97,313 | 19.6% |
| Nora Springs, IA | 1,692 | $96,346 | 18.5% |
| Hanlontown, IA | 199 | $91,837 | 12.9% |
| Mitchell, IA | 147 | $91,619 | 12.6% |
| Plymouth, IA | 483 | $93,145 | 14.5% |
| City | Population | Household Income | National Avg. |
| Kenton, DE | 483 | $55,465 | 31.8% |
| Amana, IA | 483 | $85,603 | 5.3% |
| Ringsted, IA | 483 | $74,094 | 8.9% |
| Westwood Hills, KS | 483 | $246,281 | 202.8% |
| Wellington, KY | 483 | $119,595 | 47.0% |
| Plymouth, IA | 483 | $93,145 | 14.5% |