The New York Times Fiction Best Sellers of 2004
This is a list of adult fiction books that topped The New York Times Fiction Best Seller list in 2004. Dan Brown's The Da Vinci Code, released in the spring of 2003, was the best seller for a second straight year, spending a cumulative 28 weeks at the top.
| Date | Book | Author |
| January 4 | The Da Vinci Code | Dan Brown |
| January 11 | The Da Vinci Code | Dan Brown |
| January 18 | The Da Vinci Code | Dan Brown |
| January 25 | The Da Vinci Code | Dan Brown |
| February 1 | The Da Vinci Code | Dan Brown |
| February 8 | The Da Vinci Code | Dan Brown |
| February 15 | The Da Vinci Code | Dan Brown |
| February 22 | The Last Juror | John Grisham |
| February 29 | The Last Juror | John Grisham |
| March 7 | The Last Juror | John Grisham |
| March 14 | The Da Vinci Code | Dan Brown |
| March 21 | 3rd Degree | James Patterson and Andrew Gross |
| March 28 | The Da Vinci Code | Dan Brown |
| April 4 | The Da Vinci Code | Dan Brown |
| April 11 | The Da Vinci Code | Dan Brown |
| April 18 | Glorious Appearing | Tim LaHaye and Jerry B. Jenkins |
| April 25 | Glorious Appearing | Tim LaHaye and Jerry B. Jenkins |
| May 2 | Glorious Appearing | Tim LaHaye and Jerry B. Jenkins |
| May 9 | The Da Vinci Code | Dan Brown |
| May 16 | The Da Vinci Code | Dan Brown |
| May 23 | The Da Vinci Code | Dan Brown |
| May 30 | The Da Vinci Code | Dan Brown |
| June 6 | The Da Vinci Code | Dan Brown |
| June 13 | The Da Vinci Code | Dan Brown |
| June 20 | The Da Vinci Code | Dan Brown |
| June 27 | ' | Stephen King |
| July 4 | The Da Vinci Code | Dan Brown |
| July 11 | Ten Big Ones | Janet Evanovich |
| July 18 | Sam's Letters to Jennifer | James Patterson |
| July 25 | The Da Vinci Code | Dan Brown |
| August 1 | "R" Is for Ricochet | Sue Grafton |
| August 8 | The Da Vinci Code | Dan Brown |
| August 15 | The Da Vinci Code | Dan Brown |
| August 22 | The Da Vinci Code | Dan Brown |
| August 29 | The Da Vinci Code | Dan Brown |
| September 5 | The Da Vinci Code | Dan Brown |
| September 12 | The Da Vinci Code | Dan Brown |
| September 19 | The Da Vinci Code | Dan Brown |
| September 26 | Trace | Patricia Cornwell |
| October 3 | Trace | Patricia Cornwell |
| October 10 | ' | Stephen King |
| October 17 | ' | Stephen King |
| October 24 | ' | Stephen King |
| October 31 | Northern Lights | Nora Roberts |
| November 7 | Northern Lights | Nora Roberts |
| November 14 | Hour Game | David Baldacci |
| November 21 | Metro Girl | Janet Evanovich |
| November 28 | London Bridges | James Patterson |
| December 5 | The Da Vinci Code | Dan Brown |
| December 12 | Night Fall | Nelson DeMille |
| December 19 | The Five People You Meet in Heaven | Mitch Albom |
| December 26 | The Five People You Meet in Heaven | Mitch Albom |