The district had 156,818 registered voters as of December 1, 2021[update], of whom 54,099 (34.5%) were registered as unaffiliated, 85,197 (54.3%) were registered as Democrats, 14,795 (9.4%) were registered as Republicans, and 2,727 (1.7%) were registered to other parties.[6]
Throughout the entire history of the 31st District since 1973, the district always consisted of Bayonne and southern Jersey City.[8][9][10][11][2] In order to fulfill the requirement that legislative districts be made as equal in population as possible, wards were added and removed as necessary from Jersey City to get the necessary population. As the district was always heavily urban in nature and is closely associated with the Hudson County Democratic machine, no Republican has ever been elected to the district since its creation in 1973; one of nine districts statewide to have never sent a member of another party to the Legislature.[12]
^"New Jersey Legislative Districts 1974–" (PDF). New Jersey Legislative Services Agency. 1973. Retrieved July 19, 2015.
^"New Jersey Legislative Districts" (PDF). 1981. Retrieved July 19, 2015.
^"1991 Legislative Districts" (PDF). 1991. Archived from the original (PDF) on March 4, 2016. Retrieved July 19, 2015.
^"2001 Legislative Districts" (PDF). 2001. Archived from the original (PDF) on August 11, 2011. Retrieved July 19, 2015.
^Edge, Wally (February 18, 2009). "Through parts of four decades, ten districts that have never flipped". Politicker NJ. Retrieved July 19, 2015. While Republicans held four Hudson County Assembly seats (Districts 32 and 33) from 1986 to 1988 – their first legislative victory since 1920 – Democrats have never lost the 31st.
^"Official List, Candidates for State Senate For GENERAL ELECTION 11/02/2021 Election" (PDF). Secretary of State of New Jersey. November 30, 2021. Retrieved December 26, 2021.
^"Official List, Candidates for State Senate For GENERAL ELECTION 11/07/2017 Election" (PDF). Secretary of State of New Jersey. November 29, 2017. Archived from the original (PDF) on December 5, 2017. Retrieved January 4, 2018.
^"Official List, Candidates for State Senate for GENERAL ELECTION 11/05/2013 Election" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 4, 2016. Retrieved February 15, 2016.
^"Official List, Candidate Returns for State Senate for November 2011 General Election" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on September 10, 2015. Retrieved February 15, 2016.
^"Official List, Candidate Returns for State Senate for November 2007 General Election" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on September 10, 2015. Retrieved February 15, 2016.
^"Official List, Candidate Returns for Special Senate Election for November 2004 General Election" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on September 11, 2015. Retrieved February 15, 2016.
^"Official List, Candidate Returns for State Senate for November 2003 General Election" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 5, 2016. Retrieved February 15, 2016.
^"Official List, Candidate Returns for State Senate for November 2001 General Election" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 4, 2016. Retrieved February 15, 2016.
^"Official Results, General Election Returns for the Office of State Senate for Election Held November 4, 1997" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 5, 2016. Retrieved February 15, 2016.
^ ab"Official List, General Election Returns for the Office of Senate and Assembly for Election Held November 2, 1993" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 5, 2016. Retrieved February 15, 2016.
^ ab"Official Results, General Election, November 5, 1991" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 4, 2016. Retrieved February 15, 2016.
^ ab"Candidates for the Offices of State Senate and General Assembly" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 4, 2016. Retrieved February 15, 2016.
^ ab"Candidates for the Offices of State Senate and General Assembly" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 4, 2016. Retrieved February 15, 2016.
^ ab"Candidates for the Offices of State Senate and General Assembly" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 4, 2016. Retrieved February 15, 2016.
^ ab"Results of the General Election Held November 8, 1977" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 3, 2016. Retrieved February 15, 2016.
^ ab"Results of the General Election Held November 6, 1973" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 4, 2016. Retrieved February 15, 2016.
^"Official List, Candidates for General Assembly For GENERAL ELECTION 11/02/2021 Election" (PDF). Secretary of State of New Jersey. November 30, 2021. Retrieved December 26, 2021.
^"Official List, Candidates for General Assembly For GENERAL ELECTION 11/05/2019 Election" (PDF). Secretary of State of New Jersey. December 2, 2019. Retrieved March 1, 2020.
^"Official List, Candidates for General Assembly For GENERAL ELECTION 11/07/2017 Election" (PDF). Secretary of State of New Jersey. November 29, 2017. Archived from the original (PDF) on December 5, 2017. Retrieved January 4, 2018.
^"Official List, Candidates for General Assembly for GENERAL ELECTION 11/03/2015 Election" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 4, 2016. Retrieved February 15, 2016.
^"Official List, Candidates for General Assembly for GENERAL ELECTION 11/05/2013 Election" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 4, 2016. Retrieved February 15, 2016.
^"Official List, Candidate Returns for General Assembly for November 2011 General Election" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 4, 2016. Retrieved February 15, 2016.
^"Official List, Candidate Returns for Special General Assembly for November 2010 General Election" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on September 10, 2015. Retrieved February 15, 2016.
^"Official List, Candidate Returns for General Assembly for November 2009 General Election" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on April 30, 2017. Retrieved February 15, 2016.
^"Official List, Candidate Returns for General Assembly for November 2007 General Election" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 4, 2016. Retrieved February 15, 2016.
^"Official List, Candidate Returns for General Assembly for November 2005 General Election" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 4, 2016. Retrieved February 15, 2016.
^"Official List, Candidate Returns for General Assembly 12-02-2003 for November 2003 General Election" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 5, 2016. Retrieved February 15, 2016.
^"Official List, Candidate Returns for General Assembly for November 2001 General Election" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on September 9, 2015. Retrieved February 15, 2016.
^"Official List, Candidate Returns for General Assembly for November 1999 General Election" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 4, 2016. Retrieved February 15, 2016.
^"Official Results, General Election Returns for the Office of State Assembly for Election Held November 4, 1997" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 4, 2016. Retrieved February 15, 2016.
^"Official List, General Election Results for the Office of General Assembly for Election Held November 7, 1995" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 4, 2016. Retrieved February 15, 2016.
^"NJ General Assembly 31". Our Campaigns. Retrieved October 9, 2017.
^"Candidates for the Office of General Assembly" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 4, 2016. Retrieved February 15, 2016.
^"Candidates for the Office of General Assembly" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 5, 2016. Retrieved February 15, 2016.
^"Results of the General Election Held on November 6, 1979" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on April 28, 2017. Retrieved February 15, 2016.
^"Results of the Primary Election Held June 7, 1977" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on December 3, 2013. Retrieved February 15, 2016.
^"Results of the General Election Held November 4, 1975" (PDF). Secretary of State of New Jersey. Archived from the original (PDF) on March 3, 2016. Retrieved February 15, 2016.