Number-one albums of 1978 (U.S.)
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These are the Billboard Magazine number one albums of 1978, per the Billboard 200.
| Issue Date | Album | Artist |
| January 7 | Rumours | Fleetwood Mac |
| January 14 | Rumours | Fleetwood Mac |
| January 21 | Saturday Night Fever | Bee Gees/Soundtrack |
| January 28 | Saturday Night Fever | Bee Gees/Soundtrack |
| February 4 | Saturday Night Fever | Bee Gees/Soundtrack |
| February 11 | Saturday Night Fever | Bee Gees/Soundtrack |
| February 18 | Saturday Night Fever | Bee Gees/Soundtrack |
| February 25 | Saturday Night Fever | Bee Gees/Soundtrack |
| March 4 | Saturday Night Fever | Bee Gees/Soundtrack |
| March 11 | Saturday Night Fever | Bee Gees/Soundtrack |
| March 18 | Saturday Night Fever | Bee Gees/Soundtrack |
| March 25 | Saturday Night Fever | Bee Gees/Soundtrack |
| April 1 | Saturday Night Fever | Bee Gees/Soundtrack |
| April 8 | Saturday Night Fever | Bee Gees/Soundtrack |
| April 15 | Saturday Night Fever | Bee Gees/Soundtrack |
| April 22 | Saturday Night Fever | Bee Gees/Soundtrack |
| April 29 | Saturday Night Fever | Bee Gees/Soundtrack |
| May 6 | Saturday Night Fever | Bee Gees/Soundtrack |
| May 13 | Saturday Night Fever | Bee Gees/Soundtrack |
| May 20 | Saturday Night Fever | Bee Gees/Soundtrack |
| May 27 | Saturday Night Fever | Bee Gees/Soundtrack |
| June 3 | Saturday Night Fever | Bee Gees/Soundtrack |
| June 10 | Saturday Night Fever | Bee Gees/Soundtrack |
| June 17 | Saturday Night Fever | Bee Gees/Soundtrack |
| June 24 | Saturday Night Fever | Bee Gees/Soundtrack |
| July 1 | Saturday Night Fever | Bee Gees/Soundtrack |
| July 8 | City to City | Gerry Rafferty |
| July 15 | Some Girls | The Rolling Stones |
| July 22 | Some Girls | The Rolling Stones |
| July 29 | Grease | Soundtrack |
| August 5 | Grease | Soundtrack |
| August 12 | Grease | Soundtrack |
| August 19 | Grease | Soundtrack |
| August 26 | Grease | Soundtrack |
| September 2 | Grease | Soundtrack |
| September 9 | Grease | Soundtrack |
| September 16 | Don't Look Back | Boston |
| September 23 | Grease | Soundtrack |
| September 30 | Grease | Soundtrack |
| October 7 | Don't Look Back | Boston |
| October 14 | Grease | Soundtrack |
| October 21 | Grease | Soundtrack |
| October 28 | Grease | Soundtrack |
| November 4 | Livin' In The U.S.A. | Linda Ronstadt |
| November 11 | Live and More | Donna Summer |
| November 18 | 52nd Street | Billy Joel |
| November 25 | 52nd Street | Billy Joel |
| December 2 | 52nd Street | Billy Joel |
| December 9 | 52nd Street | Billy Joel |
| December 16 | 52nd Street | Billy Joel |
| December 23 | 52nd Street | Billy Joel |
| December 30 | 52nd Street | Billy Joel |
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1940 | 1941 | 1942 | 1943 | 1944 | 1945 | 1946 | 1947 | 1948 | 1949 |
