SEN 21, formerly Senator 21 (), is a Czech political movement established in 2017 by Senator Václav Láska after leaving the Green Party. The party's candidate TomÃ¡à ¡ GolÃ¡à  won the 2018 ZlÃÂn by-election.
The party joined the European Democratic Party in February 2019.
In October 2023 Senator 21 and Volt Czechia announced that they would be standing in the 2024 European elections with a joint list.