In 2018, the township had an average property tax bill of $9,022, the highest in the county, compared to an average bill of $8,767 statewide. Franklin Township is located in the 7th Congressional District and is part of New Jersey's 23rd state legislative district. Prior to the 2010 Census, Franklin Township had been part of the , a change made by the New Jersey Redistricting Commission that took effect in January 2013, based on the results of the November 2012 general elections. As of March 23, 2011, there were a total of 2,112 registered voters in Franklin Township, of which 396 (18.8% vs. 21.5% countywide) were registered as Democrats, 890 (42.1% vs. 35.3%) were registered as Republicans and 825 (39.1% vs. 43.1%) were registered as Unaffiliated. There was one voter registered to another party. Among the township's 2010 Census population, 66.5% (vs. 62.3% in Warren County) were registered to vote, including 88.6% of those ages 18 and over (vs. 81.5% countywide). In the 2012 presidential election, Republican Mitt Romney received 921 votes (63.1% vs. 56.0% countywide), ahead of Democrat Barack Obama with 493 votes (33.8% vs. 40.8%) and other candidates with 27 votes (1.8% vs. 1.7%), among the 1,460 ballots cast by the township's 2,095 registered voters, for a turnout of 69.7% (vs. 66.7% in Warren County). In the 2008 presidential election, Republican John McCain received 960 votes (59.9% vs. 55.2% countywide), ahead of Democrat Barack Obama with 588 votes (36.7% vs. 41.4%) and other candidates with 39 votes (2.4% vs. 1.6%), among the 1,602 ballots cast by the township's 2,090 registered voters, for a turnout of 76.7% (vs. 73.4% in Warren County). In the 2004 presidential election, Republican George W. Bush received 967 votes (63.1% vs. 61.0% countywide), ahead of Democrat John Kerry with 529 votes (34.5% vs. 37.2%) and other candidates with 26 votes (1.7% vs. 1.3%), among the 1,533 ballots cast by the township's 1,900 registered voters, for a turnout of 80.7% (vs. 76.3% in the whole county).