Domestic Box Office For August 1989
| Rank | Release | Gross | Max Th | Opening | % of Total | Open Th | Open | Close | Distributor |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Parenthood | $100,047,830 | 1,399 | $10,506,450 | 10.5% | 1,262 | Aug 2 | - | Universal Pictures |
| 2 | Uncle Buck | $66,758,538 | 1,835 | $8,794,501 | 13.2% | 1,804 | Aug 18 | - | Universal Pictures |
| 3 | The Abyss | $54,222,310 | 1,538 | $9,319,797 | 17.2% | 1,533 | Aug 11 | - | 20th Century Fox |
| 4 | Sex, Lies, and Videotape | $24,741,667 | 534 | $155,982 | 0.6% | 4 | Aug 4 | - | Miramax |
| 5 | A Nightmare on Elm Street: The Dream Child | $22,168,359 | 1,902 | $8,115,176 | 36.6% | 1,902 | Aug 11 | - | New Line Cinema |
| 6 | Lock Up | $22,099,847 | 1,384 | $6,025,520 | 27.3% | 1,382 | Aug 4 | - | TriStar Pictures |
| 7 | Casualties of War | $18,671,317 | 1,487 | $5,201,261 | 27.9% | 1,487 | Aug 18 | - | Columbia Pictures |
| 8 | Young Einstein | $11,536,599 | 1,217 | $3,094,581 | 26.8% | 1,217 | Aug 4 | - | Warner Bros. |
| 9 | The Package | $10,647,219 | 460 | $1,851,673 | 17.4% | 323 | Aug 25 | - | Orion Pictures |
| 10 | Cheetah | $8,153,677 | 1,321 | $2,636,118 | 32.3% | 1,310 | Aug 18 | - | Walt Disney Studios Motion Pictures |
| 11 | Millennium | $5,777,099 | 488 | $1,614,692 | 27.9% | 486 | Aug 25 | - | 20th Century Fox |
| 12 | Let It Ride | $4,973,285 | 1,191 | $1,925,049 | 38.7% | 1,191 | Aug 18 | - | Paramount Pictures |
| 13 | Rude Awakening | $3,169,719 | 953 | $1,121,542 | 35.4% | 953 | Aug 18 | - | Orion Pictures |
| 14 | The Adventures of Milo and Otis | $2,948,215 | 239 | $470,084 | 15.9% | 239 | Aug 25 | - | Columbia Pictures |
| 15 | Cookie | $1,869,417 | 82 | $292,483 | 15.6% | 82 | Aug 25 | - | Warner Bros. |
| 16 | Romero | $1,316,495 | 51 | $10,189 | 0.8% | 2 | Aug 25 | Dec 7 | Four Square |
| 17 | Heart of Dixie | $1,097,333 | 359 | $367,091 | 33.5% | 359 | Aug 25 | - | Orion Pictures |
| 18 | Wired | $1,089,000 | 745 | $681,054 | 62.5% | 745 | Aug 25 | - | Taurus Entertainment Company |
| 19 | Little Monsters | $793,775 | 179 | $253,834 | 32% | 179 | Aug 25 | - | United Artists |
| 20 | Eddie and the Cruisers II: Eddie Lives! | $536,508 | 402 | $536,508 | 100% | 402 | Aug 18 | - | Scotti Brothers Pictures (I) |
| 21 | A Chorus of Disapproval | $216,373 | - | - | - | - | Aug 18 | Jan 11 | South Gate Entertainment |
| 22 | Race for Glory | $100,326 | - | - | - | - | Aug 11 | Nov 9 | New Century |
| 23 | Me and Him | $78,814 | 5 | $4,795 | 6.1% | 5 | Aug 4 | - | Columbia Pictures |
| 24 | Blood Red | $15,510 | - | - | - | - | Aug 18 | - | Hemdale |
| 25 | The Time Guardian | $12,682 | 2 | $3,748 | 29.6% | 2 | Aug 4 | - | Hemdale |
