Domestic Box Office For August 1980
| Rank | Release | Gross | Max Th | Opening | % of Total | Open Th | Open | Close | Distributor |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Smokey and the Bandit II | $66,132,626 | 1,196 | $10,883,835 | 16.5% | 1,196 | Aug 15 | - | Universal Pictures |
| 2 | Xanadu | $22,762,571 | 249 | $1,471,595 | 6.5% | 249 | Aug 8 | - | Universal Pictures |
| 3 | The Octagon | $18,971,000 | - | - | - | - | Aug 14 | - | American Cinema Releasing |
| 4 | The Final Countdown | $16,647,800 | - | - | - | - | Aug 1 | - | Metro-Goldwyn-Mayer (MGM) |
| 5 | The Hunter | $16,274,150 | - | - | - | - | Aug 1 | - | Paramount Pictures |
| 6 | Prom Night | $14,796,236 | - | - | - | - | Aug 15 | - | Embassy Pictures |
| 7 | The Fiendish Plot of Dr. Fu Manchu | $10,697,276 | 465 | $2,399,109 | 22.4% | 465 | Aug 8 | - | Warner Bros. |
| 8 | Battle Creek Brawl | $8,527,743 | 231 | $1,108,025 | 13% | 231 | Aug 29 | - | Warner Bros. |
| 9 | He Knows You're Alone | $4,875,436 | 279 | $748,824 | 15.4% | 279 | Aug 29 | - | Metro-Goldwyn-Mayer (MGM) |
| 10 | Why Would I Lie? | $1,175,855 | 56 | $52,473 | 4.5% | 56 | Aug 8 | - | Metro-Goldwyn-Mayer (MGM) |
| 11 | Those Lips, Those Eyes | $804,713 | 51 | $63,766 | 7.9% | 51 | Aug 15 | - | Metro-Goldwyn-Mayer (MGM) |
