The 2021 North East Lincolnshire Council election took place on 6 May 2021 to elect members of North East Lincolnshire Council in England. This was on the same day as other local elections. 14 seats were up for election, and the Conservatives retained overall control.
These elections were due to take place in 2020, but were postponed due to the COVID-19 pandemic.
|- | | Freedom Alliance | align="right"| 0 | align="right"| 0 | align="right"| 0 | align="right"| 0 | align="right"| 0.00 | align="right"| 1.75 | align="right"| 502 | align="right"| +1.75 |-
Following the last election in 2019, the composition of the council was:
After the election, the composition of the council was:
Only one seat was due to be contested, however a seat next due up for election in 2023 was also up for election due to a vacancy.
Only one seat was due to be contested, however a seat next due up for election in 2022 was also up for election due to the resignation of Lia Nici (Conservative).