2021 Three Rivers District Council election

Elections to Three Rivers District Council took place on 6 May 2021 alongside other local elections in the United Kingdom. 13 of the 39 seats were elected: the seats elected were last contested in the 2016 election. The election was originally scheduled to take place on 7 May 2020, however elections were delayed nationwide by one year due to the COVID-19 pandemic.

The Liberal Democrats held control of the council.