Classes of United States senators

The 100 U.S. Senate seats are classified into three classes of United States senators, two of which (classes 1 and 2) consist of 33 seats and one (class 3) of 34 seats. The classes determine which Senate seats will be up for election in any two-year cycle, with only one class being up for election at a time. Elections for class 1 seats took place in 2018, class 2 in 2020, and the elections for class 3 seats will be held in 2022.

Classes of United States senators

The 100 U.S. Senate seats are classified into three classes of United States senators, two of which (classes 1 and 2) consist of 33 seats and one (class 3) of 34 seats. The classes determine which Senate seats will be up for election in any two-year cycle, with only one class being up for election at a time. Elections for class 1 seats took place in 2018, class 2 in 2020, and the elections for class 3 seats will be held in 2022.