This is a list of films which placed number one at the weekly box office in the United States during 1938 per Variety's weekly National Boxoffice Survey. The results are based on a sample of 20-25 key cities and therefore, any box office amounts quoted may not be the total that the film grossed nationally in the week.
| † | This implies the highest-grossing movie of the year. [1] [2] |
| Date | Title | Ref |
|---|---|---|
| January 5 | Stage Door | [3] |
| January 12 | [3] | |
| January 19 | [3] | |
| January 26 | [3] | |
| February 2 | [4] | |
| February 9 | Snow White and the Seven Dwarfs † | [4] |
| February 16 | [4] | |
| February 23 | [4] | |
| March 2 | [5] | |
| March 9 | [5] | |
| March 16 | [5] | |
| March 23 | [5] | |
| March 30 | Jezebel | [5] |
| April 6 | [6] | |
| April 13 | [6] | |
| April 20 | [6] | |
| April 27 | [6] | |
| May 4 | [7] | |
| May 11 | [7] | |
| May 18 | The Adventures of Robin Hood | [7] |
| May 25 | [7] | |
| June 1 | [8] | |
| June 8 | [8] | |
| June 15 | [8] | |
| June 22 | [8] | |
| June 29 | [8] | |
| July 6 | [9] | |
| July 13 | [9] | |
| July 20 | [9] | |
| July 27 | [9] | |
| August 3 | [10] | |
| August 10 | Four Daughters | [10] |
| August 17 | [10] | |
| August 24 | [10] | |
| August 31 | [10] | |
| September 7 | [11] | |
| September 14 | Boys Town | [11] |
| September 21 | [11] | |
| September 28 | [11] | |
| October 5 | You Can't Take It with You | [12] |
| October 12 | [12] | |
| October 19 | [12] | |
| October 26 | [12] | |
| November 2 | [13] | |
| November 9 | [13] | |
| November 16 | [13] | |
| November 23 | [13] | |
| November 30 | [13] | |
| December 7 | [14] | |
| December 14 | [14] | |
| December 21 | [14] | |
| December 28 | [14] |