| Index | Newcastle | California | National |
| Income per capita | $46,544 | $31,458 | $29,829 |
| Median household income | $87,050 | $63,783 | $55,322 |
| Median income owner occupied | $88,688 | $86,568 | $70,586 |
| Median income renter occupied | $0 | $43,419 | $35,192 |
| Median earnings male | $66,591 | $36,599 | $36,919 |
| Median earnings female | $39,219 | $27,020 | $26,250 |
| Unemployment rate | 1.5% | 5.5% | 4.7% |
| Poverty level | 6.0% | 15.8% | 15.1% |
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| Labour Type | Male | Female |
| Construction industry | 10.9% | 10.9% |
| Manufacturing sector | 5.2% | 5.2% |
| Financial & insurance services | 4.4% | 4.4% |
| Wholesale & retail services | 24.2% | 24.2% |
| Public administration | 3.6% | 3.6% |
| Transportation, warehousing & utilities | 6.9% | 6.9% |
| Education, health & social services | 19.0% | 19.0% |
| Other | 25.8% | 25.8% |
| City | Population | Household Income | National Avg. |
| Granite Bay, CA | 22,818 | $170,504 | 208.2% |
| El Dorado Hills, CA | 47,107 | $132,130 | 138.8% |
| Folsom, CA | 79,584 | $118,006 | 113.3% |
| Auburn Lake Trails, CA | 3,495 | $105,368 | 90.5% |
| Rocklin, CA | 67,070 | $100,664 | 82.0% |
| Newcastle, CA | 1,360 | $87,050 | 57.4% |
| City | Population | Household Income | National Avg. |
| Hays, NC | 1,360 | $35,278 | 36.2% |
| Gillam, MB | 1,360 | n/a | |
| Garberville, CA | 1,361 | $25,357 | 54.2% |
| Sanborn, IA | 1,359 | $46,382 | 16.2% |
| Dayton, IN | 1,359 | $61,250 | 10.7% |
| Newcastle, CA | 1,360 | $87,050 | 57.4% |
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