Actor
| 1. | Knocked Up (2007) as Ben's Dad | |
| 2. | The Last Kiss (2006) as Professor Bowler | |
| 3. | I'm with Lucy (2003) as Jack | |
| 4. | Orange County (2002) | |
| 5. | High Fidelity (2000) as Rob's Dad | |
| 6. | As Good As It Gets (1997) as Dr. Martin Bettes | |
| 7. | Airheads (1994) as Chris Moore | |
| 8. | Love Affair (1994) as Sheldon Blumenthal | |
| 9. | Groundhog Day (1993) | |
| 10. | Ghostbusters II (1989) as Dr. Egon Spengler | |
| 11. | Stealing Home (1988) as Alan Appleby | |
| 12. | Baby Boom (1987) as Steven Bochner | |
| 13. | Ghostbusters (1984) | |
| 14. | Vacation (1983) | |
| 15. | Heavy Metal (1981) | |
| 16. | Stripes (1981) as Russell Ziskey |
Director
| 1. | The Ice Harvest (2005) Director | |
| 2. | Analyze That (2002) Director | |
| 3. | Bedazzled (2000) Director | |
| 4. | Analyze This! (1999) Director | |
| 5. | Multiplicity (1996) Director | |
| 6. | Stuart Saves His Family (1995) Director | |
| 7. | Groundhog Day (1993) Director | |
| 8. | Club Paradise (1986) Director | |
| 9. | Vacation (1983) Director | |
| 10. | Caddyshack (1980) Director | |
| 11. | Year One (working title) () Director |
Producer
| 1. | The First $20 Million Is Always the Hardest (2002) Executive Producer | |
| 2. | Bedazzled (2000) Producer | |
| 3. | Multiplicity (1996) Producer | |
| 4. | Groundhog Day (1993) Producer | |
| 5. | Back to School (1986) Executive Producer | |
| 6. | Year One (working title) () Producer |
Writer
| 1. | Groundhog Day (1993) Writer | |
| 2. | Ghostbusters II (1989) Writer | |
| 3. | Caddyshack II (1988) Writer | |
| 4. | Back to School (1986) Writer | |
| 5. | Stripes (1981) Writer | |
| 6. | Caddyshack (1980) Writer | |
| 7. | Meatballs (1979) Writer | |
| 8. | National Lampoon's Animal House (1978) Writer | |
| 9. | Year One (working title) () Writer |
Miscellaneous Crew
| 1. | Rover Dangerfield (1991) Story | |
| 2. | Armed and Dangerous (1986) Story | |
| 3. | Year One (working title) () Story |
Most Popular Films with Harold Ramis
| 1. | Groundhog Day | 1993 |
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| 2. | Orange County | 2002 |
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| 3. | The Last Kiss | 2006 |
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| 4. | Ghostbusters | 1984 |
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| 5. | Knocked Up | 2007 |
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| 6. | National Lampoon's Animal House | 1978 |
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| 7. | I'm with Lucy | 2003 |
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| 8. | Back to School | 1986 |
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| 9. | Stealing Home | 1988 |
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| 10. | Caddyshack II | 1988 |
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