Matthew Ahearn is an American politician, who served in the New Jersey General Assembly, where he 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.
Ahearn served in the Assembly on the Military & Veterans' Affairs Committee (as Vice Chair) and the Regulated Professions & Independent Authorities Committee.