The Oregon State Senate is the upper house of the statewide legislature for the US state of Oregon. Along with the lower chamber Oregon House of Representatives it makes up the Oregon Legislative Assembly. There are 30 members of the state Senate, representing 30 districts across the state, each with a population of 141,242. The state Senate meets in the east wing of the Oregon State Capitol in Salem.

The Oregon House of Representatives is the lower house of the Oregon Legislative Assembly. There are 60 members of the House, representing 60 districts across the state, each with a population of 65,000. The House meets in the west wing of the Oregon State Capitol in Salem.