Daniel M. "Dan" Knapik (born September 1, 1967) is an American politician who is currently serving as mayor of Westfield, Massachusetts since 2010. He is a member of the Republican Party.In 2002, Knapik was elected to the city council from Ward 2 and ran for Mayor of Westfield in the city's 2009 municipal election after defeating incumbent Michael Boulanger and was sworn-in on January 4, 2010.