Colin Van Ostern (born Kevin Colin O’Loughlin; February 14, 1979), is an American businessman and politician who served on the New Hampshire Executive Council from 2013 to 2017, where he represented the state's second district.
He is a member of the Democratic Party, and was the Democratic nominee for Governor of New Hampshire in 2016.
He was a candidate for a two-year term as New Hampshire Secretary of State in the New Hampshire General Court's December 5 election, which he lost to incumbent Bill Gardner.