|Elections in Hawaii|
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, the Honolulu metro 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;   Caldwell won with 52 percent of the vote, to Djou's 48 percent. 
- Kirk Caldwell, incumbent Mayor of Honolulu (voter registration: Democratic)
- Charles Djou, former U.S. Representative and former Honolulu City Councilman  (voter registration: Republican)
- Kurt Baker
- Zachary Burd
- Ernest Caravalho
- Peter Carlisle, former Mayor of Honolulu  (voter registration: Independent)
- Lawrence Friedman
- Tim Garry
- Ronald Hochuli
- Lillian Hong
- Angela Kaaihue (ran instead for, and received the Republican nomination as, U.S. Representative for Hawaii's 2nd congressional district )
- Mike Powers
- Joseph Wargo
|Hawaii News Now – Star-Advertiser ||June–July, 2016||401||± 4.9%||30%||15%||39%||9%|
|Democratic||Kirk Caldwell (incumbent)||74,057||43.7|
|Nonpartisan||Lillian Lai Wam Wang Hong||1,140||0.7|
|Nonpartisan||Ronald E. Hochuli||635||0.4|
|Nonpartisan||Lawrence (Larry) Friedman||346||0.2|
|Nonpartisan||Zachary B. Burd||97||0.1|
Caldwell won reelection on November 8, 2016, in the runoff with Djou, 52.2% to 47.8%.  Though both candidates supported the municipal rail project, substantial cost overruns were an issue, as was Caldwell's alleged interference with the Ethics Commission. 
- "Caldwell fails to clinch majority, will face off against Djou in November". Hawaii News Now. August 13, 2016. Retrieved August 14, 2016.
- Pang, Gordon Y.K. (August 13, 2016). "Caldwell, Djou head to runoff election in November". Honolulu Star-Advertiser. Retrieved August 14, 2016.
- Honolulu, Hawaii Mayor: Results: Kirk Caldwell Leads, New York Times, November 10, 2016. Retrieved 11 November 2016.
- HNN Staff (June 7, 2016). "Charles Djou announces he's running for mayor". Hawaii News Now. Retrieved June 11, 2016.
- Morales, Manolo; web staff (May 13, 2016). "Peter Carlisle announces candidacy for Honolulu mayor". KHON-TV. Retrieved June 14, 2016.
- "PRIMARY ELECTION 2016 – State of Hawaii – Statewide" (PDF). State of Hawaii Office of Elections. August 16, 2016. p. 1. Retrieved August 20, 2016.
- Blair, Chad; Hofschneider, Anita (August 13, 2016).
"Caldwell, Djou Headed For Runoff In Honolulu Mayor's Race". Civil Beat. Retrieved August 18, 2016.
Caldwell has advertised that former Gov. George Ariyoshi and current Gov. David Ige support him
- Pang, Gordon Y.K. (May 13, 2016). "Caldwell collects first major endorsement of mayoral race". Honolulu Star-Advertiser. Retrieved July 4, 2016.
- "HGEA Announces Primary Election Endorsements" (Press release). Hawaii Free Press. June 20, 2016. Retrieved July 4, 2016.
- Blair, Chad (June 15, 2016).
"Djou Gets Some Democratic Support In Campaign For Mayor". Politics. Civil Beat. Retrieved June 26, 2016.
A desire to kick Kirk Caldwell out of office brought three top Hawaii Democrats together Wednesday at a press conference to voice their support for Charles Djou for mayor.
- "SHOPO endorses Caldwell for Honolulu Mayor". KITV. June 24, 2016. Retrieved July 4, 2016.
- Blair, Chad (June 9, 2016). "Aiona Endorses Djou for Mayor". Politics. Civil Beat. Retrieved June 26, 2016.
- Devera, Jobeth (June 27, 2016).
"Major Unions Endorse Djou for Mayor". Hawaii News Now. Retrieved July 4, 2016.
This is the first time Djou has received the backing of any organized labor since 2006.
- Lee, Grace. "Mayoral and rail poll explained". Hawaii News Now. Retrieved August 18, 2016.
- "PRIMARY ELECTION 2016 – State of Hawaii – City and County of Honolulu" (PDF). State Of Hawaii Office of Elections. August 14, 2016. p. 3. Retrieved August 20, 2016.
- Mayor Kirk Caldwell Re-Elected Over Charles Djou, Honolulu Civil Beat, Chad Blair, November 8, 2016. Retrieved 11 November 2016.