Christopher Thomas Sununu (/səˈnuːnuː/ sə-NOO-noo; born November 5, 1974) is an American politician and engineer who has served as the 82nd governor of New Hampshire since 2017.

Sununu earned a bachelor's degree in civil and environmental engineering from the Massachusetts Institute of Technology. He has served as chief executive officer of the Waterville Valley Resort in New Hampshire. Sununu is a son of former New Hampshire governor and White House Chief of Staff John H. Sununu, and a younger brother of former U.S. representative and senator John E. Sununu.

Sununu's 2021 budget proposal included phasing out New Hampshire's only state income tax—on dividends and interest income (which Sununu states unfairly targets senior citizens more likely to be living off those types of income);

In January 2021, Sununu began his third term as governor of New Hampshire. In November 2021, amid speculation that he would run in the 2022 United States Senate election in New Hampshire, Sununu announced that he would instead seek a fourth term as governor in 2022

Republican Gov. Chris Sununu on Friday vetoed a bill that would have permitted pharmacists to dispense a parasite drug to treat COVID-19 by means of a standing order without a prescription.

Some Americans have been turning to ivermectin to treat the virus, a cheap drug used to kill worms and other parasites in humans and animals. Health experts and medical groups have been pushing to stamp out use of the drug, warning that it can cause harmful side effects and that there's little evidence it helps.

Sununu said in a news release that New Hampshire currently only has four instances in which pharmacists can dispense medication without a prescription: smoking cessation, contraception, substance use disorder, and treatment for sexual assault.

He said all of them "have gone through rigorous reviews and vetting to ensure they meet all the necessary protocols prior to a medication being dispensed via standing order."

He also said ivermectin remains available for individuals if prescribed by their doctor.

The bill also would have established a commission to study the use of ivermectin to treat COVID-19.