Here are the percentage votes in by-elections in 1926 with the 1922 general election result in brackets.
29 January - Dunbartonshire:
Conservative: 48.0 (50.4)
Labour: 43.9 (49.6)
Liberal: 8.1 (no candidate)
29 January - Renfrewshire, East:
Conservative: 52.0 (40.0)
Labour: 48.0 (42.5)
(Liberal: 17.5)
17 February - Darlington:
Labour: 44.5 (33.8)
Conservative: 43.3 (49.7)
Liberal: 12.2 (16.5)
8 March - Combined English Universities. Election for one member in a two-member constituency.
Conservative: 53.9
Liberal: 46.1
In general elections in this constituency two members were elected by the single transferable vote. The result of the first round of voting in 1922 was Conservative 32.8, National Liberal 27.7, Independent 19.4, Labour 12.2, Independent Conservative 4.8, Independent Conservative. The by-election was caused by the resignation of H. A. L. Fisher who was elected as a National Liberal in 1922.
26 March - Lanarkshire, Bothwell:
Labour: 59.7 (57.0)
Conservative: 35.2 (43.0)
Liberal: 5.1 (no candidate)
29 April - East Ham, North:
Labour: 40.7 (27.8)
Conservative: 34.5 (29.7)
Liberal: 24.8 (6.2)
(National Liberal: 19.7)
(Independent - "People's" candidate: 16.6)
5 May - Yorkshire: Buckrose:
Conservative: 48.7 (51.3)
Liberal: 42.5 (48.7)
Labour: 8.8 (no candidate)
28 May - Hammersmith, North:
Labour: 53.4 (29.8)
Conservative: 38.6 (46.3)
Liberal: 8.0 (23.9)
21 July - Wallsend:
Labour: 57.7 (46.8)
Conservative: 30.1 (37.6)
Liberal: 12.2 (9.6)
(National Democratic and Labour party: 6.0)
17 September - Cumberland, Northern:
Conservative: 47.8 (50.6)
Liberal: 37.1 (49.4)
Labour; 15.1 (nio candidate)
25 November - Yorkshire, Howdenshire:
Conservative: 54.2 (60.5)
Liberal: 34.0 (no candidate)
Labour: 11.8 (no candidate)
(Independent - farmers' candidate: 39.5)
29 November - Kingston-upon-Hull, Central:
Labour: 52.9 (no candidate)
Conservative: 37.6 (44.5)
Liberal: 9.5 (55.5)
The by-election was caused by Joseph Kenworthy, the Liberal MP since being elected in a by-election on 29 March 1919, resigning the seat and seeking re-election as a Labour candidate.
30 November - Essex, Chelmsford:
Conservative: 47.8 (52.6)
Liberal: 30.2 (29.8)
Labour: 22.0 (17.6)
21 December - Smethwick:
Labour: 57.1 (50.7)
Conservative: 33.7 (49.3)
Liberal: 9.2 (no candidate).