| Dem | |
| Rep | |
| Una | |
| Oth | |
| Total | 0 |
| Margin |
| Year | Election | Registered Voters | Ballots Cast | Turnout | Dem Votes | Dem Votes % | Rep Votes | Rep Votes % | Dem Candidate | Rep Candidate | Margin | Margin % |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | 97,727 | 47,719 | 48.83 % | 21,108 | 44.23 % | 25,680 | 53.82 % | 4,572 | 9.59% | |||
| 2022 | 402,936 | 197,097 | 48.92 % | 97,137 | 49.28 % | 93,151 | 47.26 % | 3,986 | 2.02% | |||
| 2020 | 389,909 | 304,149 | 78.01 % | 147,034 | 48.34 % | 143,959 | 47.33 % | 3,075 | 1.01% | |||
| 2018 | 364,147 | 221,172 | 60.74 % | 112,965 | 51.08 % | 98,307 | 44.45 % | 14,658 | 6.63% | |||
| 2016 | 351,541 | 255,893 | 72.79 % | 83,655 | 32.69 % | 139,250 | 54.42 % | 55,595 | 21.73% | |||
| 2014 | 329,199 | 119,767 | 36.38 % | 38,599 | 32.23 % | 74,334 | 62.07 % | 35,735 | 29.84% | |||
| 2012 | 327,422 | 228,674 | 69.84 % | 73,139 | 31.98 % | 128,281 | 56.10 % | 55,142 | 24.12% |
| Muni | Registered Voters | Ballot Cast | Dem Votes | Rep Votes | ||
|---|---|---|---|---|---|---|
| Chester Borough | 1,338 | 745 | 314 | 420 | ||
| Chester Township | 6,840 | 3,331 | 1,432 | 1,855 | ||
| Long Hill Township | 7,211 | 3,998 | 1,881 | 2,070 | ||
| Mendham Borough | 4,545 | 2,538 | 1,205 | 1,298 | ||
| Mendham Township | 5,451 | 3,016 | 1,297 | 1,337 | ||
| Mine Hill Township | 2,947 | 1,284 | 605 | 659 | ||
| Mount Arlington Borough | 5,094 | 2,401 | 1,043 | 1,335 | ||
| Mount Olive Township | 22,018 | 9,588 | 4,646 | 4,834 | ||
| Netcong Borough | 2,526 | 1,064 | 417 | 622 | ||
| Roxbury Township | 19,349 | 9,518 | 3,796 | 5,611 | ||
| Washington Township | 15,621 | 8,431 | 3,550 | 4,808 | ||
| Wharton Borough | 4,787 | 1,805 | 922 | 831 |
| Municipality | Citizens 18+ | Reg Dem | Reg Rep | Reg Una | Tot Reg Voters | Tot Reg Voters % |
|---|