The Colorado Senate is the upper house of the Colorado General Assembly, the state legislature of the U.S. state of Colorado. It is composed of 35 members elected from single-member districts, with each district having a population of about 123,000 as of the 2000 census. Senators are elected to 4-year terms, and are limited to 2 consecutive terms in office.
The Colorado Senate convenes at the State Capitol in Denver.
| Affiliation | Members | |
| Democratic Party | 20 | |
| Republican Party | 15 | |
| Total | 35 | |
| Majority | 5 | |
==Leadership==
| Position | Senator | District | |
|---|---|---|---|
| President | Peter Groff | 33 | |
| Majority Leader | Ken Gordon | 35 | |
| Minority Leader | Andy McElhaney | 12 | |