| Poll | Date | Sample | Hirono | Case | Spread |
|---|---|---|---|---|---|
| Honolulu Star-Advertiser | 1/26 - 2/5 | 599 RV | 56 | 36 | Hirono +20 |
| Honolulu Civil Beat/MRG | 1/18 - 1/19 | 1358 LV | 39 | 41 | Case +2 |
| PPP (D) | 10/13 - 10/16 | 368 RV | 45 | 40 | Hirono +5 |
| Honolulu Star-Advertiser | 5/4 - 5/10 | 403 RV | 25 | 26 | Case +1 |
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