| Index | Mountainside | New Jersey | National |
| Income per capita | $86,877 | $55,297 | $44,883 |
| Median household income | $183,726 | $108,915 | $81,333 |
| Median income owner occupied | $220,019 | $143,334 | $106,172 |
| Median income renter occupied | $65,942 | $61,880 | $52,080 |
| Median earnings male | $139,499 | $69,742 | $54,343 |
| Median earnings female | $88,333 | $46,406 | $38,439 |
| Unemployment rate | 1.8% | 5.4% | 4.9% |
| Poverty level | 1.6% | 10.9% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 2.2% | 2.2% |
| Manufacturing sector | 10.0% | 10.0% |
| Financial & insurance services | 12.3% | 12.3% |
| Wholesale & retail services | 17.4% | 17.4% |
| Public administration | 6.5% | 6.5% |
| Transportation, warehousing & utilities | 5.5% | 5.5% |
| Education, health & social services | 7.4% | 7.4% |
| Other | 34.3% | 34.3% |
| City | Population | Household Income | National Avg. |
| Short Hills, NJ | 14,190 | $375,147 | 361.2% |
| Mountain Lakes, NJ | 4,398 | $339,890 | 317.9% |
| Essex Fells, NJ | 2,112 | $326,681 | 301.7% |
| Glen Ridge, NJ | 7,786 | $317,221 | 290.0% |
| Upper Montclair, NJ | 11,734 | $313,735 | 285.7% |
| Mountainside, NJ | 7,074 | $183,726 | 125.9% |
| City | Population | Household Income | National Avg. |
| Live Oak, FL | 7,073 | $66,168 | 18.6% |
| Idabel, OK | 7,077 | $43,722 | 46.2% |
| Baie-Saint-Paul, QC | 7,069 | n/a | |
| Pea Ridge, WV | 7,080 | $69,977 | 14.0% |
| Saint-Apollinaire, QC | 7,067 | n/a | |
| Mountainside, NJ | 7,074 | $183,726 | 125.9% |