Iain Duncan Smith Votes: 1999
| Date | Division | Vote | Party alignment |
|---|---|---|---|
| 1999-11-10 | House of Lords Bill — Exceptions from the rule that hereditary peers should be abolished | Absent | n/a |
| 1999-06-23 | Referendum on Changing the Voting System for the House of Commons | Aye | 100.00% |
| 1999-05-04 | Greater London Authority Bill — Enforcing no smoking signs in London taxis | Absent | n/a |
| 1999-03-16 | House of Lords Bill — Third Reading | No | 100.00% |
| 1999-03-01 | Sexual Offences (Amendment) Bill — Third Reading | No | 91.67% |
| 1999-02-16 | House of Lords Bill — Hereditary peers to be elected by House of Lords members — rejected | Aye | 100.00% |
| 1999-02-15 | House of Lords Bill — Exclusion of hereditary peers from voting — rejected | Absent | n/a |
| 1999-02-10 | Sexual Offences (Amendment) Bill — Clause 1 — Age of Consent for Homosexual Acts | No | 89.66% |
| 1999-02-02 | House of Lords Bill — Decline to give a Second Reading — rejected | Aye | 100.00% |
| 1999-02-02 | House of Lords Bill — Second Reading | No | 100.00% |
| 1999-01-25 | Sexual Offences (Amendment) Bill — Second Reading | No | 93.69% |