The results of the 25 "double" elections and 15 single seat by-elections held on 2 May 2019 are shown below. As in previous years the party topping the poll in a "double" election is considered to have won the annual election and that second the by-election.
Conservatives defended 15 seats, retained 12 and lost 3"Double" elections - 10Broxbourne BC, Broxbourne & Hoddesdon South - retained both seats
Hart DC, Hook - Independent gained annual election, Conservative retained by-election
Havant BC, Purbrook - retained both seats
Portsmouth UA, Cosham - retained both seats
Reading UA, Thames - retained both seats
Three Rivers DC, Carpenders Park - retained both seats
Tunbridge Wells BC, Paddock Wood East - Independent gained annual election, Conservative retained by-election
Tunbridge Wells BC, Park - Tunbridge Wells Alliance gained both seatsWelwyn Hatfield BC, Hatfield East - retained both seats
Wolverhampton MB, Tettenhall Wightwick - retained both seats
Other by-elections - 5
Craven DC, Upper Wharfedale - retained
Cumbria CC, Thursby -
retained
Kent CC, Sittingbourne North - Swale Independent gainedNewcastle-under-Lyme BC, Maer & Whitmore - retained
Surrey CC, Haslemere - Independent gainedLabour defended 16 seats, retained 13 and lost 3"Double" elections - 9Cambridge BC, Kings Hedges - retained both seats
Exeter BC, Priory - retained both seats
Manchester MB, Fallowfield - retained both seats
Newcastle upon Tyne MB, Monument - retained both seats
North East Lincolnshire UA, South - Labour retained annual seat, UKIP gained by-electionSouth Tyneside MB, Cleadon & East Boldon - retained both seats
Thurrock UA, Chadwell St Mary - retained both seats
Welwyn Hatfield BC, Hatfield South West - retained both seats
Wolverhampton MB, Wednesfield South - retained both seats
Other by-elections - 7
Dundee UA, North East - SNP gainedDurham UA, Shildon & Dene Valley - Liberal Democrat gainedKent CC, Northfleet & Gravesend West - retained
Lewisham LB, Evelyn - retained
Lewisham LB, Whitefoot - retained
Northumberland UA, Holywell - retained
West Sussex CC, Northgate & West Green - retained
Liberal Democrat defended 8 seats, retained 7 and lost 1"Double" elections - 6* Cambridge BC, Trumpington - retained both seats
Cherwell DC, Kidlington West - retained both seats
St Albans DC, Sopwell - retained both seats
** Sefton MB, Norwood - Labour gained both seats* Sunderland MB, Sandhill - 10 candidates: 2 Con, 2 Lab, 2 LD, 2 UKIP, 1 Green, 1 Populist
Watford BC, Meriden - retained both seats
Other by-elections - 2Cambridgeshire CC, Trumpington - retained
Gloucester CC, Churchdown - retained
* sitting as Independent
** sitting as Labour
Spennymoor Independent defended 1 seat which was lostBy-elections - 1Durham UA, Spennymoor - Independent gainedThe results, where 20% changed hands, can be summarised by:
| Party | Defended | Retained | Gained | Lost | Won | retention rate |
| Conservative | 15 | 12 |
| 3 | 12 | 80% |
Labour | 16 | 13 | 1 | 3 | 14 | 81% |
Liberal Democrat | 8 | 7 | 1 | 1 | 8 | 87% |
SNP |
|
| 1 |
| 1 |
|
UKIP |
|
| 1 |
| 1 |
|
Localists ^ | 1 |
| 2 | 1 | 2 | 0% |
Independent |
|
| 2 |
| 2 |
|
Total | 40 | 32 | 8 | 8 | 40 | 80% |
^ Spennymoor Independent (lost), Swale Independent (gained) and Tunbridge Wells Alliance (gained)
