North Yorkshire Council elections are generally held every four years. From 1974 until 2023 the council was called North Yorkshire County Council and it was an upper tier county council, with district-level functions being provided by the area's district councils. The districts were all abolished with effect from 1 April 2023, at which point the county council became a unitary authority, taking on the functions of the abolished district councils. The county council changed its name to North Yorkshire Council to coincide with the change in its powers.

There was no election in 2021 because of proposals to turn the county council into a unitary authority. The council elected in 2022 will remain in post until 2027, after which elections will revert to being every four years.

The following is an incomplete list of by-elections to North Yorkshire County Council.

By-election following death of Denis Pedder.

By-election following resignation of Ron Haigh.

By-election following resignation of Melva Steckles.

By-election following death of Margaret Hulme.

By-election following death of Polly English.