Jeff Duncan is a South Carolina native and a 1988 graduate of Clemson University. Prior to being elected to the U.S. House of Representatives, he was the President and CEO of J. Duncan Associates, a South Carolina based, family owned real estate marketing firm which specialized in statewide real estate auctions. Jeff also has seven years of experience in community banking.

Duncan was a member of the South Carolina General Assembly from 2002-2010, where he served as the Chairman of the House Agriculture, Natural Resources and Environmental Affairs Committee from 2007 to 2010.

During his tenure in the South Carolina General Assembly, Jeff was known as one of the most conservative House Members, earning recognition as a "Taxpayer's Hero" from Governor Mark Sanford for his work combating wasteful government spending and fighting against tax increases. Jeff has also received the "Guardian of Small Business" award from the National Federation of Independent Businesses (NFIB); he had an A+ rating from the Club for Growth; he was awarded the Palmetto Leadership Award from the SC Policy Council during his Freshman term; "Legislator of the Year" recognition from both the SC Recreation and Parks Association and the SC Wildlife Federation.  In 2010, Jeff Duncan was awarded The Order of the Palmetto, the highest civilian honor awarded by the Governor of South Carolina.

Elected to the 112th Congress in 2010, Jeff currently sits on three House committees including the Natural Resources Committee, the Homeland Security Committee, and the Foreign Affairs Committee.  Additionally, Congressman Duncan was appointed by Speaker John Boehner to the Executive Committee for the Tom Lantos Human Rights Commission.

Congressman Duncan is passionate about American Energy Independence and his place on the Natural Resources Committee gives him an outlet to promote US energy policy. Jeff is an integral part of the GOP's House Energy Action Team (HEAT) which supports expedited permitting of energy projects and the use of currently undeveloped areas for energy production in the United States, including areas such as the Arctic National Wildlife Refuge and other Federal land.

Jeff takes a particular interest in the promotion of nuclear energy, a topic especially important to South Carolina, home of the Savannah River Site nuclear complex.  Energy independence is vital to both national security and job creation.  He views nuclear power as a key ingredient in that equation. He supports the use of the Yucca Mountain site in Nevada as a long-term storage site for nuclear waste.  Although he is a strong proponent of American solutions to American energy issues, Congressman Duncan is not in favor of federal energy subsidies for alternative energy or ethanol.

As a Member of the Natural Resources Committee, Jeff can also advocate for some of his passions: the enjoyment of the great outdoors as an avid hunter and fisherman.  Jeff sits on the subcommittee for fisheries and wildlife.

Jeff took a strong stand on major fiscal issues in the first session of the 112th Congress as an active member of both the Republican Study Committee and the Tea Party Caucus. Dissatisfied with the level of spending cuts offered, he split from a majority of Republicans in his opposition of: the final fiscal 2011 spending deal; the final debt limit increase deal in August 2011; both versions of a bill to keep the government operating at the start of fiscal 2012; and the final FY 2012 Appropriations bill.  A strong believer in the Constitution, he also fought against ambiguous language in the National Defense Authorization Act which he feels could put certain American liberties in peril.

In February 2011, Congressman Duncan introduced a resolution that would create a new committee called the Committee on the Elimination of Nonessential Federal Programs, with the express purpose of reducing federal outlays. He supports taking a closer look at any government agency that is not included in the constitutional role of the federal government.

Jeff is a proud member of the Border and Maritime Security subcommittee, and strongly believes that border security does fit the Constitutional definition of a federal duty. He advocates an "all-of-the-above" strategy for border enforcement, including physical fencing, greater use of surveillance technology and increased manpower. His stance on border security includes an immigration policy aspect, as well as a national security element. He supports stronger enforcement of immigration laws and opposes amnesty for illegal immigrants already in the country.

Duncan has also worked the national security angle to border enforcement from his position on the Foreign Affairs Committee.  At the start of the second session of the 112th Congress, he introduced a bill called Countering Iran in the Western Hemisphere Act of 2012. This legislation makes it clear that American policy is to counter Iran's influence in Latin America by requiring a coordinated and targeted strategy that uses all elements of national power. Specifically, the legislation charges the Administration to detail the presence of Iran, the Iranian Revolutionary Guard Corps' (IRGC), the IRGC's Qods Force, Hezbollah, and Hamas in the Western Hemisphere.

Act! for America presented Representative Duncan with the "2011 National Security Patriot Award" because of his strong and enduring commitment to protecting our national security and democratic values.

Jeff also serves as the co-chairman of the Sovereignty Caucus along with Colorado Republican Doug Lamborn. The Caucus seeks to combat the influence of international organizations and multilateral agreements on United States policy. He urges greater scrutiny of foreign aid and has been an advocate for blocking economic assistance to governments that oppose the United States in the U.N. General Assembly.

In September 2011, Duncan became the only member of Congress with a 100 percent rating on the Heritage Action for America legislative scorecard "covering the full spectrum of conservatism." He remains at the top of the House leader board as of July 2012.

Jeff has been married to his wife Melody for twenty-three years and they have three sons: Graham, John Philip, and Parker. The Duncan family are members of First Baptist Church of Clinton, South Carolina.