| Election Name: | 1942 United States Senate election in New Jersey |
| Country: | New Jersey |
| Flag Year: | 1896 |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1936 United States Senate election in New Jersey |
| Previous Year: | 1936 |
| Next Election: | 1948 United States Senate election in New Jersey |
| Next Year: | 1948 |
| Election Date: | November 3, 1942 |
| Image1: | Albert Wahl Hawkes.jpg |
| Nominee1: | Albert Hawkes |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 648,855 |
| Percentage1: | 53.09% |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 559,851 |
| Percentage2: | 45.81% |
| Map Size: | 280px |
| Senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Republican Party (US) |
The United States Senate election of 1942 in New Jersey was held on November 3, 1942. Incumbent Democratic Senator William Smathers ran for re-election to a second term, but was defeated by Republican businessman Albert Hawkes.
As of, this is the last time an incumbent U.S. Senator from New Jersey lost re-election, although in 2002 incumbent Senator Robert Torricelli dropped out in late September while trailing in the polls.[1]
Senator Smathers was unopposed for re-nomination.