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|  | Nadler, Jerrold | D | NY | U.S. House | 1993 – 2025 |
| | Nagle, David Ray | D | IA | U.S. House | 1987 – 1993 |
| | Napier, John Light | R | SC | U.S. House | 1981 – 1983 |
| | Napolitano, Grace | D | CA | U.S. House | 1999 – 2025 |
| | Natcher, William Huston | D | KY | U.S. House | 1953 – 1994 |
| | Neal, Richard | D | MA | U.S. House | 1989 – 2025 |
| | Neal, Stephen Lybrook | D | NC | U.S. House | 1975 – 1995 |
| | Neal, William Elmer | R | WV | U.S. House | 1953 – 1959 |
| | Nedzi, Lucien Norbert | D | MI | U.S. House | 1962 – 1981 |
| | Neely, Matthew Mansfield | D | WV | U.S. Senate | 1913 – 1958 |
| | Neguse, Joe | D | CO | U.S. House | 2019 – 2025 |
| | Nehls, Troy | R | TX | U.S. House | 2021 – 2025 |
| | Nelligan, James Leo | R | PA | U.S. House | 1981 – 1983 |
| | Nelsen, Ancher | R | MN | U.S. House | 1959 – 1975 |
| | Nelson, Ben | D | NE | U.S. Senate | 2001 – 2013 |
| | Nelson, Bill | D | FL | U.S. Senate | 1979 – 2019 |
| | Nelson, Charles Pembroke | R | ME | U.S. House | 1949 – 1957 |
| | Nelson, Gaylord Anton | D | WI | U.S. Senate | 1963 – 1981 |
| | Nethercutt, George | R | WA | U.S. House | 1995 – 2005 |
| | Neuberger, Maurine Brown | D | OR | U.S. Senate | 1961 – 1967 |
| | Neuberger, Richard Lewis | D | OR | U.S. Senate | 1955 – 1960 |
| | Neugebauer, Randy | R | TX | U.S. House | 2003 – 2017 |
| | Neumann, Mark W. | R | WI | U.S. House | 1995 – 1999 |
| | Newhouse, Dan | R | WA | U.S. House | 2015 – 2025 |
| | Newman, Marie | D | IL | U.S. House | 2021 – 2023 |
| | Ney, Bob | R | OH | U.S. House | 1995 – 2007 |
| | Nichols, Richard | R | KS | U.S. House | 1991 – 1993 |
| | Nichols, William Flynt | D | AL | U.S. House | 1967 – 1988 |
| | Nicholson, Donald William | R | MA | U.S. House | 1947 – 1959 |
| | Nickel, Wiley | D | NC | U.S. House | 2023 – 2025 |
| | Nickles, Don | R | OK | U.S. Senate | 1981 – 2005 |
| | Nielson, Howard Curtis | R | UT | U.S. House | 1983 – 1991 |
| | Nimtz, F. Jay | R | IN | U.S. House | 1957 – 1959 |
| | Nix, Robert Nelson Cornelius, Sr. | D | PA | U.S. House | 1958 – 1979 |
| | Nixon, Richard Milhous | R | | U.S. President | 1947 – 1974 |
| | Nodar, Robert Joseph, Jr. | R | NY | U.S. House | 1947 – 1949 |
| | Noem, Kristi | R | SD | U.S. House | 2011 – 2019 |
| | Nolan, Rick | D | MN | U.S. House | 1975 – 2019 |
| | Noland, James Ellsworth | D | IN | U.S. House | 1949 – 1952 |
| | Norblad, Albin Walter, Jr. | R | OR | U.S. House | 1946 – 1964 |
| | Norcross, Donald | D | NJ | U.S. House | 2014 – 2025 |
| | Norman, Fred Barthold | R | WA | U.S. House | 1947 – 1947 |
| | Norman, Ralph | R | SC | U.S. House | 2017 – 2025 |
| | Norrell, Catherine Dorris | D | AR | U.S. House | 1961 – 1963 |
| | Norrell, William Frank | D | AR | U.S. House | 1945 – 1961 |
| | Northup, Anne M. | R | KY | U.S. House | 1997 – 2007 |
| | Norton, Mary Teresa | D | NJ | U.S. House | 1945 – 1952 |
| | Norwood, Charlie | R | GA | U.S. House | 1995 – 2007 |
| | Nowak, Henry James | D | NY | U.S. House | 1975 – 1993 |
| | Nugent, Rich | R | FL | U.S. House | 2011 – 2017 |
| | Nunes, Devin | R | CA | U.S. House | 2003 – 2022 |
| | Nunn, Samuel Augustus | D | GA | U.S. Senate | 1972 – 1997 |
| | Nunn, Zach | R | IA | U.S. House | 2023 – 2025 |
| | Nunnelee, Alan | R | MS | U.S. House | 2011 – 2015 |
| | Nussle, Jim | R | IA | U.S. House | 1991 – 2007 |
| | Nye, Glenn | D | VA | U.S. House | 2009 – 2011 |
| | Nygaard, Hjalmar Carl | R | ND | U.S. House | 1961 – 1963 |