Votes of Rep. Ken S. Calvert compared to positions of the Sierra Club
| Bill | Description | Member | Group |
| H. 6 | CLEAN Energy Act of 2007 | Unknown | Support |
| H. 2764 | Department of State, Foreign Operations and Related Programs Appropriations Act, 2008 | Oppose | Oppose |
| H. 5684 | United States-Oman Free Trade Agreement Implementation Act | Support | Oppose |
