Biggest majorities at the 1966 general election

The safest wins: constituencies won by the largest share of the vote in each general election.

#	Constituency	Winner	Runner-up	Majority	%
1	Abertillery	Lab	Con	20,202	76.22
2	Bedwellty	Lab	Con	24,984	72.50
3	Hemsworth	Lab	Con	34,722	70.79
4	Ebbw Vale	Lab	Con	20,584	70.28
5	Poplar	Lab	Con	17,208	69.01
6	Rhondda East	Lab	Oth	19,218	68.98
7	Dearne Valley	Lab	Con	30,614	67.99
8	Rhondda West	Lab	PC	16,888	67.44
9	West Ham South	Lab	Con	19,492	65.68
10	Bolsover	Lab	Con	24,299	64.06
11	Sheffield Park	Lab	Con	19,533	63.86
12	Neath	Lab	Con	24,871	63.56
13	Easington	Lab	Con	24,747	62.73
14	Aberdare	Lab	Con	22,118	61.60
15	Bermondsey	Lab	Con	12,615	61.25
16	Merthyr Tydfil	Lab	Con	17,655	60.50
17	Swansea East	Lab	Con	24,049	59.85
18	Caerphilly	Lab	Con	21,148	59.64
19	Stepney	Lab	Con	18,049	59.46
20	Down North	Con	Lib	28,124	57.06
21	Pontefract	Lab	Con	23,401	56.72
22	Ogmore	Lab	Con	26,673	56.69
23	Pontypool	Lab	Con	20,491	56.57
24	Blyth	Lab	Con	26,314	56.38
25	Llanelli	Lab	Con	26,531	56.26
26	Antrim North	Con	Lib	22,986	56.24
27	Houghton-le-Spring	Lab	Con	22,763	55.02
28	Newcastle-upon-Tyne Central	Lab	Con	13,817	54.90
29	Sheffield Brightside	Lab	Con	19,177	54.61
30	Sheffield Attercliffe	Lab	Con	22,825	54.54
31	Aberavon	Lab	Con	24,394	54.51
32	Gower	Lab	Con	21,058	54.33
33	Chester-le-Street	Lab	Con	22,747	53.92
34	Rother Valley	Lab	Con	30,467	53.64
35	Normanton	Lab	Con	20,332	52.81
36	Bethnal Green	Lab	Con	15,253	52.70
37	Dagenham	Lab	Con	24,525	52.23
38	Southwark	Lab	Con	15,401	51.83
39	Barnsley	Lab	Con	26,288	51.34
40	Glasgow Gorbals	Lab	Con	9,940	50.24
41	Middlesbrough East	Lab	Con	18,984	50.19
42	Pontypridd	Lab	Con	20,515	49.84
43	Don Valley	Lab	Con	29,235	49.79
44	Glasgow Central	Lab	Con	7,749	49.68
45	Gateshead West	Lab	Con	13,503	49.54
46	Glasgow Springburn	Lab	Con	11,499	48.75
47	Morpeth	Lab	Con	16,525	48.72
48	Glasgow Bridgeton	Lab	Con	10,600	48.54
49	Liverpool Scotland	Lab	Con	9,514	48.16
50	West Ham North	Lab	Lib	15,896	47.90

Single-member seats with a recorded contest. Percentages are of valid votes.

Official results House of Commons Library and UK Parliament election results data. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. How we use this data