List of 2004 box office number-one films in the United Kingdom
This is a list of films which have placed number one at the weekend box office in the United Kingdom during 2004.
| # | Weekend End Date | Film | Total Weekend Gross | Notes |
| 1 | ' | £6,496,723 | ||
| 2 | The Lord of the Rings: The Return of the King | £3,713,999 | ||
| 3 | The Lord of the Rings: The Return of the King | £2,377,268 | ||
| 4 | Scary Movie 3 | £3,490,585 | ||
| 5 | Scary Movie 3 | £1,894,077 | ||
| 6 | School of Rock | £2,742,356 | ||
| 7 | Cheaper by the Dozen | £1,817,148 | ||
| 8 | The Haunted Mansion | £1,564,558 | ||
| 9 | Along Came Polly | £2,252,808 | ||
| 10 | Along Came Polly | £1,572,126 | ||
| 11 | Mona Lisa Smile | £1,190,923 | ||
| 12 | Starsky & Hutch | £4,145,897 | ||
| 13 | The Passion of the Christ | £2,019,935 | ||
| 14 | ' | £3,549,487 | ||
| 15 | Scooby-Doo 2: Monsters Unleashed | £2,038,602 | ||
| 16 | Scooby-Doo 2: Monsters Unleashed | £1,772,130 | ||
| 17 | Kill Bill Volume 2 | £2,768,832 | ||
| 18 | Kill Bill Volume 2 | £1,456,152 | ||
| 19 | Van Helsing | £5,429,632 | ||
| 20 | Van Helsing | £2,403,036 | ||
| 21 | Troy | £6,017,523 | ||
| 22 | The Day After Tomorrow | £7,321,633 | ||
| 23 | Harry Potter and the Prisoner of Azkaban | £23,882,688 | ||
| 24 | Harry Potter and the Prisoner of Azkaban | £4,391,262 | ||
| 25 | Harry Potter and the Prisoner of Azkaban | £3,374,330 | ||
| 26 | Harry Potter and the Prisoner of Azkaban | £2,029,289 | ||
| 27 | Shrek 2 | £16,220,752 | ||
| 28 | Shrek 2 | £7,097,154 | ||
| 29 | Spider-Man 2 | £8,766,902 | ||
| 30 | Spider-Man 2 | £3,590,463 | ||
| 31 | King Arthur | £1,908,084 | ||
| 32 | I, Robot | £4,745,541 | ||
| 33 | The Bourne Supremacy | £2,720,016 | ||
| 34 | The Village | £2,945,763 | ||
| 35 | ' | £2,200,271 | ||
| 36 | The Terminal | £1,451,168 | ||
| 37 | Open Water | £1,970,176 | ||
| 38 | Collateral | £2,238,200 | ||
| 39 | Wimbledon | £1,699,096 | ||
| 40 | Wimbledon | £1,499,011 | ||
| 41 | Bride and Prejudice | £1,667,616 | ||
| 42 | Shark Tale | £7,545,074 | ||
| 43 | Shark Tale | £3,199,963 | ||
| 44 | Shark Tale | £2,435,188 | ||
| 45 | The Grudge | £2,261,710 | ||
| 46 | ' | £10,435,193 | ||
| 47 | Bridget Jones: The Edge of Reason | £5,047,315 | ||
| 48 | The Incredibles | £9,753,035 | ||
| 49 | The Incredibles | £4,187,280 | ||
| 50 | £2,633,626 | |||
| 51 | Lemony Snicket's A Series of Unfortunate Events | £2,210,979 | ||
| 52 | The Polar Express | £688,859 |