The Iowa Senate is the upper house of the Iowa General Assembly, United States. There are 50 seats in the Iowa Senate, representing 50 single-member districts across the state of Iowa with populations of approximately 60,927 per constituency, as of the 2010 United States census. Each Senate district is composed of two House districts. The Senate meets at the Iowa State Capitol in Des Moines.

The Iowa General Assembly is the legislative branch of the state government of Iowa. Like the federal United States Congress, the General Assembly is a bicameral body, composed of the upper house Iowa Senate and the lower Iowa House of Representatives respectively. The Senate consists of four year terms and the House consists of two year terms. The General Assembly convenes within the Iowa State Capitol in Des Moines since the capital was moved there in 1857. The assembly convenes annually on the second Monday in January.