List of Tamil films of 2003
Post-amendment to the Tamil Nadu Entertainments Tax Act 1939 on 12 June 2000, gross fell to 125 per cent of net. The Commercial Taxes Department disclosed 75.07 crore in entertainment tax revenue for the year.
A list of films released in the Tamil film industry in India in 2003:
Box office collection
The following is the [list of highest-grossing Tamil cinema|Tamil films|list of highest-grossing Tamil cinema films] released in 2003.| Rank | Title | Production company | Worldwide gross |
| 1 | Saamy | Kavithalayaa Productions | |
| 2 | Dhool | Sri Surya Movies | |
| 3 | Thirumalai | Kavithalayaa Productions | |
| 4 | Pithamagan | V Creations | |
| 5 | Kaakha Kaakha | GJ Cinema | |
| 6 | Chokka Thangam | GV Films | |
| 7 | Vaseegara | Shot N' Stills Ltd | |
| 8 | Kaadhal Kondein | R. K. Productions | |
| 9 | Thiruda Thirudi | Indian Theatre Productions | |
| 10 | Anbe Sivam | Lakshmi Movie Makers |
List of Tamil films
October—December
The following films also released in 2003, though the release date remains unknown.| Title | Director | Cast | Production | Ref |
| IPC 215 | Charuhasan | Ponvannan, Jaishankar | ||
| Adhaanda Idhaanda | R. G. Elavalagan | Pandiarajan, Sangeetha | ||
| Bhayam | David | |||
| Oru Thadava Sonna | M. Jameenraj | Chinni Jayanth, Swarna, Lavanya | ||
| Rekkai | B. Lenin | Narayana Rao, M. S. Vishalakshi, N. Madankumar | ||
| Uyirosai | Hariram | Bharath, Soni | ||
| Vaanam Vaazhthattum | Raveeshwar | Vimalahasan, Rashmi, Kulkarni | ||
| Vani Mahal | Jayram | Vignesh, Suvalakshmi |