| Election Name: | 2016 Honolulu mayoral election |
| Flag Image: | Flag of Honolulu, Hawaii.svg |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 Honolulu mayoral election |
| Previous Year: | 2012 |
| Next Election: | 2020 Honolulu mayoral election |
| Next Year: | 2020 |
| Election Date: | (primary) (runoff) |
| Image1: | Carvalho, Caldwell and Hirono (cropped).jpg |
| Nominee1: | Kirk Caldwell |
| Color1: | c0c0c0 |
| 1Data1: | 74,057 43.7% |
| 2Data1: | 147,885 52.2% |
| Nominee2: | Charles Djou |
| Color2: | c0c0c0 |
| 1Data2: | 72,520 42.8% |
| 2Data2: | 135,662 47.8% |
| Image3: | Peter Carlisle, 2012.jpg |
| Nominee3: | Peter Carlisle |
| Color3: | c0c0c0 |
| 1Data3: | 15,539 9.2% |
| 2Data3: | Eliminated |
| Map Size: | 300px |
| Mayor | |
| Before Election: | Kirk Caldwell |
| Before Party: | Democratic Party (United States) |
| After Election: | Kirk Caldwell |
| After Party: | Democratic Party (United States) |
| 1Blank: | First round |
| 2Blank: | Runoff |
The 2016 Honolulu mayoral election determined the Mayor of the City and County of Honolulu for the full term commencing in January 2017. As in the previous several elections, Skyline and its cost overruns was a major topic of the campaign.
Incumbent Democratic Mayor Kirk Caldwell ran for re-election to a second term. A non-partisan blanket primary was held on Saturday, August 13, 2016. As no candidate received an outright majority of the vote in the primary, the top-two finishers, Caldwell and former Republican U.S. Representative Charles Djou, advanced to the general election runoff on Tuesday, November 8, 2016;[1] [2] Caldwell won with 52 percent of the vote, to Djou's 48 percent.
| Poll source | Date(s) administered | class=small | Sample size | Margin of error | Kirk Caldwell | Peter Carlisle | Charles Djou | Undecided | ||
|---|---|---|---|---|---|---|---|---|---|---|
| Hawaii News Now – Star-Advertiser[6] | June–July, 2016 | 401 | ± 4.9% | align=center | 30% | 15% | align=center | 39% | 9% |
Caldwell won reelection on November 8, 2016, in the runoff with Djou, 52.2% to 47.8%.[7] Though both candidates supported the municipal rail project, substantial cost overruns were an issue, as was Caldwell's alleged interference with the Ethics Commission.[8]