Actor
| 1. | In Good Company (2005) | |
| 2. | Erin Brockovich (2000) as Donna Jensen | |
| 3. | Species II (1998) as Dr. Laura Baker | |
| 4. | Fire Down Below (1997) as Sarah Kellogg | |
| 5. | The Last Time I Committed Suicide (1997) as Lizzy | |
| 6. | Species (1995) as Dr. Laura Baker | |
| 7. | Bad Boys (1995) | |
| 8. | The Cowboy Way (1994) as Margarette | |
| 9. | The Keys (1992) as Maureen 'Kick' Kickasola | |
| 10. | After Midnight (1989) as Alex | |
| 11. | Always (1989) as Rachael | |
| 12. | Lie Down With Lions () as Kate Nessen | |
| 13. | Columbus Day (working title) () | |
| 14. | Keys to Her Past () |
Most Popular Films with Marg Helgenberger
| 1. | Columbus Day (working title) |
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| 2. | The Cowboy Way | 1994 |
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| 3. | Species II | 1998 |
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| 4. | Bad Boys | 1995 |
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| 5. | Lie Down With Lions |
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| 6. | Erin Brockovich | 2000 |
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| 7. | Keys to Her Past |
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| 8. | After Midnight | 1989 |
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| 9. | The Last Time I Committed Suicide | 1997 |
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| 10. | Species | 1995 |
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