As Connecticut does not have gubernatorial term limits, incumbent Democratic Governor Dannel Malloy was eligible to run for a third term, but declined to do so. After the resignation of Kansas Governor Sam Brownback in January 2018, Malloy became the most unpopular governor in the United States. The general election was between 2006 Democratic Senate nominee and businessman Ned Lamont, and Republican businessman Bob Stefanowski.
Ned Lamont, businessman, former Greenwich Selectman, nominee for the U.S. Senate in 2006 and candidate for Governor of Connecticut in 2010 (endorsed by the state party)
Under the rules established by the convention, any candidate not receiving at least eight percent of the vote would be eliminated in the first round of voting. In the second round of voting, candidates not receiving 15 percent of the vote would be eliminated. In all subsequent rounds of voting, the candidate with the fewest votes would be eliminated, regardless of percentage. Voting would continue until one candidate receives 50 percent plus one of all votes cast.
^Team Boughton [@TeamBoughton] (January 24, 2018). "Today, @MayorMark is honored to announce the following endorsements from across Connecticut in support of his run for Governor" (Tweet) – via Twitter.
^Team Boughton. "I'm honored to be endorsed by Deputy House Republican Leader @RepCandelora!".
^ abcdefgTeam Boughton [@TeamBoughton] (February 20, 2018). "From @MayorMark- I am honored to announce the following endorsements from across Connecticut in support of my Gubernatorial campaign" (Tweet) – via Twitter.
^"Boughton for Governor Announces Fourth Round of Endorsements". April 23, 2018.
^ abcdefghij"More Republican Leaders Stand with Mark Boughton!". Boughton for Governor. May 10, 2018.
^ ab"UPDATED: Lauretti backs Stefanowski; other Shelton Republicans choose Herbst, Obsitnik". Shelton Herald. July 23, 2018.
^ ab"Laffer, GOP Gubernatorial Candidate Push To Eliminate CT Income Tax". December 5, 2017.
^ ab"Peter Lumaj Backs Bob Stefanowski In Governor's Race". Hartford Courant. June 11, 2018.
^ ab"State Senator Len Suzio (R-13) Endorses Bob Stefanowski". June 12, 2018.
^ ab"David Walker Backs Bob Stefanowski For Governor". June 13, 2018.
^ ab"Madison Lawmaker Endorses GOP Gubernatorial Candidate". Madison Patch. June 16, 2018.
^ ab"20-Year-Olds Make History As Black Republicans While Middletown Grows More Diverse". Hartford Courant. December 18, 2017.
^ abBob Stefanowski. "Thank you @SteveForbesCEO for supporting my economic plan to rebuild Connecticut. Our state needs a political outsider with experience turning around large organizations like Connecticut. My plan cuts taxes and gets Connecticut working again!". Twitter.
^ ab"Mark Lauretti Backs Bob Stefanowski In GOP Primary For Governor, Won't Rule Out Independent Run". Hartford Courant. July 23, 2018.
^ abBob Stefanowski. "I am pleased to announce that Enfield Mayor, Mike Ludwick, has endorsed me to be Connecticut's next governor. I hope that you will join Mike in voting for me on Tuesday!". Twitter.
^ ab"State Representative Dave Yaccarino (R-87) Endorses Bob Stefanowski for Governor". Bob for Governor.
^HAN Network (August 13, 2018). "Hwang endorses David Stemerman for governor". Fairfield Sun.
^"Best Bet For Republican Governor: David Stemerman". Hartford Courant. August 5, 2018.
^Blair, Russell (February 1, 2018). "Melissa Joan Hart Makes Endorsement In Connecticut Governor's Race". Hartford Courant.
^ abcdefgh"Lauretti Campaign Releases First Round Of Endorsements". Lauretti for Governor 2018.
^ abcdef"Lumaj Announces Steering Committee For Exploratory Effort" (Press release). Peter Lumaj for CT. February 6, 2018. Retrieved February 10, 2018.
^Peter Lumaj [@PeterLumaj] (January 23, 2018). "Lumaj Grabs Major Endorsement! Senator Henri Martin Endorses Lumaj For Governor!" (Tweet) – via Twitter.
^Peter Lumaj [@PeterLumaj] (February 1, 2018). "Happy to have the endorsement of @Rep80! Rob is a great friend and a steadfast conservative leader! Looking forward to working with him the create a #FreshStart4CT!" (Tweet) – via Twitter.
^Erin Stewart [@erinstewartct] (May 2, 2018). "I am honored to receive an endorsement from former U.S. Rep. Nancy Johnson. Read more at bit.ly/2KaGSeT" (Tweet) – via Twitter.
^"Markley seeks a run for Lt. Governor". Southington Observer. March 30, 2017. Retrieved July 8, 2018.
^"UPDATED with reaction: First Selectman Jayme Stevenson to run for lieutenant governor – Darien". www.darientimes.com. Retrieved July 8, 2018.
^"Stewart Drops Bid for Gov., Will Run for Lieutenant Gov". NBC Connecticut. Retrieved July 8, 2018.
^"Ann Brookes will not wage GOP primary in 2nd Congressional - The CT MirrorThe CT Mirror". ctmirror.org. Retrieved July 8, 2018.
^"Erin Stewart switches to Lt. Gov., drops Tesei". Connecticut Post. May 11, 2018. Retrieved July 8, 2018.
^"Joseph Markley for Connecticut Lieutenant Governor". National Review. August 8, 2018.
^"Erin Stewart For Republican Lieutenant Governor". Hartford Courant. August 5, 2018.
^Pazniokis, Mark (December 19, 2017). "Oz Griebel to open indy run with a Sandy Hook running mate". Retrieved December 20, 2017.
^Blair, Russell (July 12, 2017). "New Canaan's Joe Scarborough Leaving Republican Party". Retrieved July 14, 2017.
^Tchelidze, Ekaterine (September 9, 2017). "War hero aims for Hartford". The Chronicle. Retrieved January 1, 2018.
^Donald Trump. "It is about time that Connecticut had a real and talented Governor. Bob Stefanowski is the person needed to do the job. Tough on crime, Bob is also a big cutter of Taxes. He will win in November and make a Great Governor, a major difference maker. Bob has my total Endorsement!". Twitter.
^David Stemerman. "David: "I just got off the phone with Bob Stefanowski to offer him my support as the best chance to fix Connecticut." THANK YOU to our supporters, to our team and to the people of Connecticut. Let's unite and #SaveConnecticut". Twitter.
^The Editorial Board (October 25, 2018). "A Connecticut Rescue Plan". The Wall Street Journal. Retrieved October 27, 2018.
^Altimari, Daniela (October 18, 2018). "Bob Stefanowski Makes a Play for Democratic Voters". Hartford Courant.
^Mark Pazniokas (August 26, 2018). "Independent Party cross-endorses Stefanowski and GOP ticket". The Connecticut Mirror.
^"NFIB Connecticut PAC Endorses Bob Stefanowski in the race for Governor". NFIB. October 11, 2018.
^ abAltimari, Daniela (October 15, 2018). "Realtors, Electrical Contractors Back Bob Stefanowski for Governor". Hartford Courant. Retrieved October 23, 2018.
^"We endorse: Stefanowski for governor". Greenwich Sentinel. November 2, 2018.
^Barack Obama. "Today, I'm proud to endorse even more Democratic candidates who aren't just running against something, but for something—to expand opportunity for all of us and to restore dignity, honor, and compassion to public service. They deserve your vote:". Twitter.
^"President Barack Obama Endorses Ned Lamont for Governor of Connecticut". NedLamont.com. October 1, 2018. Retrieved October 2, 2018.
^Ned Lamont. "Vice President Biden is an inspiration to all Americans and I am honored to receive his endorsement, @JoeBiden". Twitter.
^"U.S. Sen. Chris Murphy Endorses Ned Lamont for Governor". NedLamont.com. August 18, 2018. Retrieved August 20, 2018.
^"Thank you, Sen. @DickBlumenthal for your endorsement..." Ned Lamont on Twitter. August 21, 2018. Archived from the original on August 22, 2018.
^Ned Lamont. "My thanks to @KamalaHarris for her enthusiastic support and for speaking to Connecticut voters about how much is at stake in this election". Twitter.
^Emilie Munson (August 15, 2018). "Kamala Harris calls in her support for Lamont". The Connecticut Post. Retrieved August 16, 2018.
^Jim Himes. "Very happy to stand with @NedLamont @ShawnTWooden @SteveStafstrom @reprosario128 @repsantiago130 in #Bridgeport for some serious door-knocking!". Twitter.
^"Medal of Honor recipient Paul Bucha of Ridgefield wants you to know his choice for governor. I am grateful beyond words". Ned Lamont on Facebook. Retrieved October 27, 2018.
^"With my good friend @NedLamont at his #Hartford headquarters running through #ElectionDay strategy. #VoteNed". Ted Kennedy Jr. on Twitter. November 5, 2018.
^Ned Lamont. "Thank you so much @donnabrazile for joining @SusanForCT and me in Hartford. Thank you for bringing your inspiring message to Connecticut. We will keep on speaking out, keep on fighting, and yes, we will VOTE!". Twitter.
^"Lamont emerges as best choice for governor". The Day. October 20, 2018. Retrieved October 21, 2018.
^"Our endorsements for the 2018 midterm elections". The Lakeville Journal. October 24, 2018. Retrieved October 24, 2018.
^"Editorial: Ned Lamont for governor". Stamford Advocate. Hearst Connecticut Media Group. October 28, 2018.
^"Editorial: Ned Lamont for governor". Connecticut Post. Hearst Connecticut Media Group. October 28, 2018.
^"Editorial: Ned Lamont for governor". The Hour. Hearst Connecticut Media Group. October 28, 2018.
^"Editorial: Ned Lamont for governor". The Hour. Hearst Connecticut Media Group. October 28, 2018.
^"EDITORIAL: Lamont for governor". Record-Journal. October 29, 2018.
^"CTLCV Endorses Ned Lamont - Connecticut League of Conservation Voters". Connecticut League of Conservation Voters.
^"The Sierra Club of Connecticut has endorsed Susan and me, citing our "demonstrated commitment to protecting the environment."". Ned Lamont on Twitter. October 19, 2018. Retrieved October 21, 2018.
^"Newtown Action Alliance Endorses Ned Lamont for Governor of Connecticut". Newtown Action Alliance. October 23, 2018.
^"Everytown for Gun Safety Action Fund Endorses More Than 70 State and Federal Candidates". Everytown for Gun Safety. October 9, 2018. Retrieved October 25, 2018.
^"Without leadership at top, CT gun laws are at risk. @NedLamont as Governor will be champion for gun safety". Connecticut Against Gun Violence on Twitter. October 25, 2018.
^Silber, Clarice (September 27, 2018). "Lamont wins CT state police union endorsement". The Connecticut Mirror. Retrieved September 27, 2018.
^"Editorial: The Courant Endorses Oz Griebel For Governor". Hartford Courant. October 28, 2018.