| Index | Newcastle | California | National |
| Income per capita | $68,960 | $45,980 | $44,883 |
| Median household income | $128,973 | $95,535 | $81,333 |
| Median income owner occupied | $134,117 | $130,228 | $106,172 |
| Median income renter occupied | $0 | $64,137 | $52,080 |
| Median earnings male | $95,944 | $52,776 | $54,343 |
| Median earnings female | $56,870 | $38,938 | $38,439 |
| Unemployment rate | 1.6% | 6.8% | 4.9% |
| Poverty level | 6.0% | 15.8% | 15.1% |

| 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 | 23,374 | $250,147 | 207.6% |
| El Dorado Hills, CA | 48,625 | $198,149 | 143.6% |
| Folsom, CA | 82,389 | $173,212 | 113.0% |
| Auburn Lake Trails, CA | 3,629 | $154,053 | 89.4% |
| Rocklin, CA | 69,145 | $150,823 | 85.4% |
| Newcastle, CA | 1,397 | $128,973 | 58.6% |
| City | Population | Household Income | National Avg. |
| Oxford, IN | 1,397 | $62,109 | 23.6% |
| Reese, MI | 1,397 | $107,233 | 31.8% |
| Plandome, NY | 1,397 | $375,731 | 362.0% |
| Palmdale, PA | 1,397 | $76,398 | 6.1% |
| South Wenatchee, WA | 1,397 | $65,698 | 19.2% |
| Newcastle, CA | 1,397 | $128,973 | 58.6% |