Elections to 143 local authorities took place in May 2021. This included 24 county councils, 35 metropolitan boroughs, 28 unitary authorities and 62 district-level councils.
| Conservative | 64 | ||
| Labour | 44 | ||
| NOC | 28 | ||
| Liberal Democrat | 7 |
| Barnsley | Lab HOLD | |
| Blackburn with Darwen | Lab HOLD | |
| Bolton | NOC GAIN from Lab | |
| Bradford | Lab HOLD | |
| Bristol | NOC GAIN from Lab | |
| Buckinghamshire | Con WIN | |
| Bury | Lab HOLD | |
| Calderdale | Lab GAIN from NOC | |
| Cambridgeshire | NOC GAIN from Con | |
| Cornwall | Con GAIN from NOC | |
| Coventry | Lab HOLD | |
| Derby | NOC GAIN from Lab | |
| Derbyshire | Con HOLD | |
| Devon | Con HOLD | |
| Doncaster | Lab HOLD | |
| Dudley | Con GAIN from NOC | |
| Durham | NOC GAIN from Lab | |
| East Sussex | Con HOLD | |
| Essex | Con HOLD | |
| Gateshead | Lab HOLD | |
| Gloucestershire | Con HOLD | |
| Halton | Lab HOLD | |
| Hampshire | Con HOLD | |
| Hartlepool | NOC GAIN from Lab | |
| Hertfordshire | Con HOLD | |
| Hull | Lab HOLD | |
| Isle of Wight | NOC GAIN from Con | |
| Kent | Con HOLD | |
| Kirklees | NOC HOLD | |
| Knowsley | Lab HOLD | |
| Lancashire | Con HOLD | |
| Leeds | Lab HOLD | |
| Leicestershire | Con HOLD | |
| Lincolnshire | Con HOLD | |
| Liverpool | Lab HOLD | |
| Manchester | Lab HOLD | |
| Milton Keynes | NOC HOLD | |
| Newcastle upon Tyne | Lab HOLD | |
| Norfolk | Con HOLD | |
| North East Lincolnshire | Con GAIN from NOC | |
| North Northamptonshire | Con WIN | |
| North Tyneside | Lab HOLD | |
| Northumberland | Con GAIN from NOC | |
| Nottinghamshire | Con GAIN from NOC | |
| Oldham | Lab HOLD | |
| Oxfordshire | NOC HOLD | |
| Peterborough | NOC GAIN from Con | |
| Plymouth | NOC HOLD | |
| Portsmouth | NOC HOLD | |
| Reading | Lab HOLD | |
| Rochdale | Lab HOLD | |
| Rotherham | Lab HOLD | |
| Salford | Lab HOLD | |
| Sandwell | Lab HOLD | |
| Sefton | Lab HOLD | |
| Sheffield | NOC GAIN from Lab | |
| Shropshire | Con HOLD | |
| Slough | Lab HOLD | |
| Solihull | Con HOLD | |
| South Tyneside | Lab HOLD | |
| Southampton | Con GAIN from Lab | |
| Southend-on-Sea | NOC HOLD | |
| St Helens | Lab HOLD | |
| Staffordshire | Con HOLD | |
| Stockport | NOC HOLD | |
| Suffolk | Con HOLD | |
| Sunderland | Lab HOLD | |
| Surrey | Con HOLD | |
| Swindon | Con HOLD | |
| Tameside | Lab HOLD | |
| Thurrock | Con GAIN from NOC | |
| Trafford | Lab GAIN from Con | |
| Wakefield | Lab HOLD | |
| Walsall | Con GAIN from NOC | |
| Warrington | Lab HOLD | |
| Warwickshire | Con HOLD | |
| West Northamptonshire | Con WIN | |
| West Sussex | Con HOLD | |
| Wigan | Lab HOLD | |
| Wiltshire | Con HOLD | |
| Wirral | NOC GAIN from Lab | |
| Wokingham | Con HOLD | |
| Wolverhampton | Lab HOLD | |
| Worcestershire | Con HOLD |
| Adur | Con HOLD | |
| Amber Valley | Con HOLD | |
| Basildon | Con GAIN from NOC | |
| Basingstoke and Deane | Con HOLD | |
| Brentwood | Con HOLD | |
| Broxbourne | Con HOLD | |
| Burnley | NOC GAIN from Lab | |
| Cambridge | Lab HOLD | |
| Cannock Chase | Con GAIN from Lab | |
| Castle Point | Con HOLD | |
| Cheltenham | LD HOLD | |
| Cherwell | Con HOLD | |
| Chorley | Lab HOLD | |
| Colchester | NOC HOLD | |
| Crawley | NOC GAIN from Lab | |
| Eastleigh | LD HOLD | |
| Elmbridge | NOC HOLD | |
| Epping Forest | Con HOLD | |
| Exeter | Lab HOLD | |
| Fareham | Con HOLD | |
| Gloucester | Con HOLD | |
| Gosport | Con HOLD | |
| Harlow | Con GAIN from Lab | |
| Hart | NOC HOLD | |
| Hastings | Lab HOLD | |
| Havant | Con HOLD | |
| Hyndburn | Lab HOLD | |
| Ipswich | Lab HOLD | |
| Lincoln | Lab HOLD | |
| Maidstone | Con GAIN from NOC | |
| Mole Valley | LD GAIN from Con | |
| North Hertfordshire | NOC GAIN from Con | |
| Norwich | Lab HOLD | |
| Nuneaton and Bedworth | Con GAIN from Lab | |
| Oxford | Lab HOLD | |
| Pendle | Con GAIN from NOC | |
| Preston | Lab HOLD | |
| Redditch | Con GAIN from Lab | |
| Reigate and Banstead | Con HOLD | |
| Rochford | Con HOLD | |
| Rossendale | NOC GAIN from Lab | |
| Rugby | Con GAIN from NOC | |
| Runnymede | Con HOLD | |
| Rushmoor | Con HOLD | |
| St Albans | LD GAIN from Con | |
| Stevenage | Lab HOLD | |
| Stroud | NOC HOLD | |
| Tamworth | Con HOLD | |
| Tandridge | Con HOLD | |
| Three Rivers | LD GAIN from NOC | |
| Tunbridge Wells | NOC GAIN from Con | |
| Watford | LD HOLD | |
| Welwyn Hatfield | Con HOLD | |
| West Lancashire | NOC GAIN from Lab | |
| West Oxfordshire | Con HOLD | |
| Winchester | LD GAIN from Con | |
| Woking | NOC GAIN from Con | |
| Worcester | Con GAIN from NOC | |
| Worthing | Con HOLD |