List of number-one R&B singles of 2005 (U.S.)
These are the Billboard R&B singles chart number-one singles of 2005.
Chart history
| Issue Date | Song | Artist |
| January 1 | "Let Me Love You" | Mario |
| January 8 | "Let Me Love You" | Mario |
| January 15 | "Let Me Love You" | Mario |
| January 22 | "Let Me Love You" | Mario |
| January 29 | "Let Me Love You" | Mario |
| February 5 | "Let Me Love You" | Mario |
| February 12 | "Let Me Love You" | Mario |
| February 19 | "Let Me Love You" | Mario |
| February 26 | "Let Me Love You" | Mario |
| March 5 | "Let Me Love You" | Mario |
| March 12 | "Let Me Love You" | Mario |
| March 19 | "Candy Shop" | 50 Cent featuring Olivia |
| March 26 | "Candy Shop" | 50 Cent featuring Olivia |
| April 2 | "Candy Shop" | 50 Cent featuring Olivia |
| April 9 | "Candy Shop" | 50 Cent featuring Olivia |
| April 16 | "Hate It or Love It" | The Game featuring 50 Cent |
| April 23 | "Hate It Or Love It" | The Game featuring 50 Cent |
| April 30 | "1 Thing" | Amerie |
| May 7 | "Slow Down" | Bobby Valentino |
| May 14 | "Slow Down" | Bobby Valentino |
| May 21 | "Slow Down" | Bobby Valentino |
| May 28 | "Slow Down" | Bobby Valentino |
| June 4 | "We Belong Together" | Mariah Carey |
| June 11 | "We Belong Together" | Mariah Carey |
| June 18 | "We Belong Together" | Mariah Carey |
| June 25 | "We Belong Together" | Mariah Carey |
| July 2 | "We Belong Together" | Mariah Carey |
| July 9 | "We Belong Together" | Mariah Carey |
| July 16 | "We Belong Together" | Mariah Carey |
| July 23 | "We Belong Together" | Mariah Carey |
| July 30 | "We Belong Together" | Mariah Carey |
| August 6 | "We Belong Together" | Mariah Carey |
| August 13 | "We Belong Together" | Mariah Carey |
| August 20 | "We Belong Together" | Mariah Carey |
| August 27 | "We Belong Together" | Mariah Carey |
| September 3 | "We Belong Together" | Mariah Carey |
| September 10 | "Like You" | Bow Wow featuring Ciara |
| September 17 | "Like You" | Bow Wow featuring Ciara |
| September 24 | "Gold Digger | Kanye West featuring Jamie Foxx |
| October 1 | "Gold Digger | Kanye West featuring Jamie Foxx |
| October 8 | "Gold Digger | Kanye West featuring Jamie Foxx |
| October 15 | "Gold Digger | Kanye West featuring Jamie Foxx |
| October 22 | "Soul Survivor | Young Jeezy featuring Akon |
| October 29 | "Soul Survivor | Young Jeezy featuring Akon |
| November 5 | "Soul Survivor | Young Jeezy featuring Akon |
| November 12 | "Soul Survivor" | Young Jeezy featuring Akon |
| November 19 | "Run It!" | Chris Brown |
| November 26 | "Run It!" | Chris Brown |
| December 3 | "I Think They Like Me" | Dem Franchize Boyz featuring Jermaine Dupri, Da Brat and Bow Wow |
| December 10 | "I Think They Like Me" | Dem Franchize Boyz featuring Jermaine Dupri, Da Brat and Bow Wow |
| December 17 | "I Think They Like Me" | Dem Franchize Boyz featuring Jermaine Dupri, Da Brat and Bow Wow |
| December 24 | "Don't Forget About Us" | Mariah Carey |
| December 31 | "Don't Forget About Us" | Mariah Carey |
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See also
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| | 1942–1959 | |
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| | 1960–1979 | |
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| | 1980–1999 | |
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| | 2000–present | |
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