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|   County results Kerry:   80–85%   85–90%   90–95%   95–100% | |||||||||||||||||||
| Elections in New Jersey | 
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The 2004 New Jersey Democratic presidential primary was held on June 8, 2004, and featured the two candidates who were still campaigning for the nomination: presumptive nominee Senator John Kerry of Massachusetts and congressman Dennis Kucinich of Ohio. Kerry won a landslide victory at 92% to Kucinich's 4%.
| Poll source | Date(s) administered | Sample size | Margin of error | Wesley Clark | Hillary Clinton | Tom Daschle | Howard Dean | John Edwards | Dick Gephardt | Al Gore | Bob Graham | John Kerry | Dennis Kucinich | Joe Lieberman | Carol Moseley-Braun | Al Sharpton | Other | Undecided | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Quinnipiac [1] | December 3–9, 2002 | 934 RV | ±3.2% | – | 22% | 5% | 0% | 2% | 7% | 37% | – | 14% | – | 5% | – | – | – | 6% | 
| Quinnipiac [2] | January 22–27, 2003 | 294 RV | ±5.7% | – | – | – | 4% | 7% | 9% | – | – | 18% | – | 32% | – | 12% | – | 17% | 
| Quinnipiac [3] | June 11–16, 2003 | 272 RV | ±5.9% | – | 48% | – | 3% | 3% | 7% | – | 2% | 11% | 1% | 14% | 1% | 8% | – | 7% | 
| – | – | – | 6% | 3% | 13% | – | 3% | 15% | 0% | 26% | 5% | 8% | – | 21% | ||||
| Quinnipiac [4] | September 18–22, 2003 | 322 RV | ±5.5% | 8% | 41% | – | 9% | 3% | 9% | – | 0% | 8% | 1% | 10% | 1% | 3% | – | 6% | 
| 16% | – | – | 12% | 4% | 13% | – | 1% | 14% | 0% | 17% | 2% | 9% | – | 13% | ||||
| Quinnipiac [5] | November 6–10, 2003 | 351 RV | ±5.2% | 9% | 42% | – | 9% | 3% | 5% | – | – | 9% | 0% | 10% | 1% | 2% | – | 11% | 
| 11% | – | – | 16% | 2% | 9% | – | – | 15% | 0% | 16% | 6% | 5% | – | 20% | 
| Candidate | No. State Delegates | Percentage | Potential National delegates | 
|---|---|---|---|
| John Kerry | 191,816 | 92.14 | 106 | 
| Dennis Kucinich | 9,074 | 4.36 | 0 |