These are the Billboard magazine number-one albums from 1949.
| Issue date | Album | Artist(s) | Label | Ref. |
|---|---|---|---|---|
| January 1 | Merry Christmas | Bing Crosby | Decca | [1] |
| January 8 | [2] | |||
| January 15 | [3] | |||
| January 22 | Vaughn Monroe Sings | Vaughn Monroe | RCA Victor | [4] |
| January 29 | Roses in Rhythm | Frankie Carle | Columbia | [5] |
| February 5 | Vaughn Monroe Sings | Vaughn Monroe | RCA Victor | [6] |
| February 12 | Words and Music | Soundtrack | MGM | [7] |
| February 19 | [8] | |||
| February 26 | [9] | |||
| March 5 | [10] | |||
| March 12 | [11] | |||
| March 19 | Kiss Me, Kate | Original Cast | Columbia | [12] |
| March 26 | Words and Music | Soundtrack | MGM | [13] |
| April 2 | Kiss Me, Kate | Original Cast | Columbia | [14] |
| April 9 | [15] | |||
| April 16 | [16] | |||
| April 23 | [17] | |||
| April 30 | [18] | |||
| May 7 | [19] | |||
| May 14 | [20] | |||
| May 21 | [21] | |||
| May 28 | [22] | |||
| June 4 | South Pacific | Mary Martin and Ezio Pinza | Columbia | [23] |
| June 11 | [24] | |||
| June 18 | [25] | |||
| June 25 | [26] | |||
| July 2 | [27] | |||
| July 9 | [28] | |||
| July 16 | [29] | |||
| July 23 | [30] | |||
| July 30 | [31] | |||
| August 6 | [32] | |||
| August 13 | [33] | |||
| August 20 | [34] | |||
| August 27 | [35] | |||
| September 3 | [36] | |||
| September 10 | [37] | |||
| September 17 | [38] | |||
| September 24 | [39] | |||
| October 1 | [40] | |||
| October 8 | [41] | |||
| October 15 | [42] | |||
| October 22 | [43] | |||
| October 29 | [44] | |||
| November 5 | [45] | |||
| November 12 | [46] | |||
| November 19 | [47] | |||
| November 26 | [48] | |||
| December 3 | [49] | |||
| December 10 | [50] | |||
| December 17 | [51] | |||
| December 24 | Merry Christmas | Bing Crosby | Decca | [52] |
| December 31 | [53] |