Matthew Ahearn is an American politician, who served in the New Jersey General Assembly, where he has represented the 38th legislative district from 2002 to 2004. Ahearn represented a district which covers an area between the Passaic and Hudson Rivers in suburban Bergen County. Ahearn was elected to the Assembly as a Democrat in 2002, but switched his registration to the Green Party in January 2003, while in office after a much-publicized feud with Bergen County Democratic Organization chief Joe Ferriero. Ahearn ran as the Green Party candidate in 2003 and lost to Robert M. Gordon, the Democratic candidate for office.