List of prime ministers of the United Kingdom by tenure start

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This article lists each prime minister of the United Kingdom by order of their tenure start. There is a difference in numbering due to prime ministers being in office for different, non-consecutive terms; for example, current Prime Minister Boris Johnson is the 77th prime minister, but just the 55th person to hold this office. [1]

Contents

Sir Robert Walpole is generally regarded as the de facto first prime minister of Great Britain. While serving multiple, non-consecutive terms have been frequent throughout history, that practice has generally died out in recent times, with Harold Wilson being the last prime minister to do so nearly 50 years ago.

Ordered by tenure, by person

#Prime MinisterTerm startTerms in officeTenure lengthPolitical party
1 Sir Robert Walpole 1721120 years, 314 days Whig
2 The Earl of Wilmington 174211 year, 119 days Whig
3 Henry Pelham 1743110 years, 191 days Whig
4 The Duke of Newcastle 175427 years, 205 days Whig
5 The Duke of Devonshire 17561225 days Whig
6 The Earl of Bute 17621317 days Tory
7 George Grenville 176312 years, 85 days Whig (Grenvillite)
8 The Marquess of Rockingham 176521 year, 113 days Whig (Rockinghamite)
9 The Earl of Chatham 176612 years, 76 days Whig (Chathamite)
10 The Duke of Grafton 176811 year, 106 days Whig (Chathamite)
11 Lord North 1770112 years, 58 days Tory (Northite)
12 The Earl of Shelburne 17821266 days Whig (Chathamite)
13 The Duke of Portland 178323 years, 82 days Whig / Tory (Pittite)
14 William Pitt the Younger 1783218 years, 343 days Tory (Pittite)
15 Henry Addington 180113 years, 54 days Tory (Pittite)
16 The Lord Grenville 180611 year, 42 days Whig
17 Spencer Perceval 180912 years, 221 days Tory (Pittite)
18 The Earl of Liverpool 1812114 years, 305 days Tory (Pittite)
19 George Canning 18271119 days Tory (Canningite)
20 The Viscount Goderich 18271144 days Tory (Canningite)
21 The Duke of Wellington 182822 years, 320 days Tory
22 The Earl Grey 183013 years, 229 days Whig
23 The Viscount Melbourne 183426 years, 255 days Whig
24 Sir Robert Peel 183425 years, 57 days Conservative
25 Lord John Russell 184626 years, 11 days Whig / Liberal
26 The Earl of Derby 185233 years, 280 days Conservative
27 The Earl of Aberdeen 185212 years, 42 days Peelite
28 The Viscount Palmerston 185529 years, 141 days Whig / Liberal
29 Benjamin Disraeli 186826 years, 339 days Conservative
30 William Ewart Gladstone 1868412 years, 126 days Liberal
31 The Marquess of Salisbury 1885313 years, 252 days Conservative
32 The Earl of Rosebery 189411 year, 109 days Liberal
33 Arthur Balfour 190213 years, 145 days Conservative
34 Henry Campbell-Bannerman 190512 years, 122 days Liberal
35 H. H. Asquith 190818 years, 244 days Liberal
36 David Lloyd George 191615 years, 317 days Liberal
37 Bonar Law 19221211 days Conservative (Scot. Unionist)
38 Stanley Baldwin 192337 years, 82 days Conservative
39 Ramsay MacDonald 192426 years, 289 days Labour / National Labour
40 Neville Chamberlain 193712 years, 348 days Conservative
41 Sir Winston Churchill 194028 years, 239 days Conservative
42 Clement Attlee 194516 years, 92 days Labour
43 Sir Anthony Eden 195511 year, 279 days Conservative
44 Harold Macmillan 195716 years, 281 days Conservative
45 Sir Alec Douglas-Home 19631363 days Conservative (Scot. Unionist)
46 Harold Wilson 196427 years, 279 days Labour
47 Edward Heath 197013 years, 259 days Conservative
48 James Callaghan 197613 years, 29 days Labour
49 Margaret Thatcher 1979111 years, 208 days Conservative
50 John Major 199016 years, 155 days Conservative
51 Tony Blair 1997110 years, 56 days Labour
52 Gordon Brown 200712 years, 318 days Labour
53 David Cameron 201016 years, 63 days Conservative
54 Theresa May 201613 years, 11 days Conservative
55 Boris Johnson 201912 years, 10 days(incumbent) Conservative

Ordered by term

#Prime MinisterTerm startTermTenure lengthPolitical party
1 Sir Robert Walpole 17211st20 years, 314 days Whig
2 The Earl of Wilmington 17421st1 year, 119 days Whig
3 Henry Pelham 17431st10 years, 191 days Whig
4 The Duke of Newcastle 17541st2 years and 241 days Whig
5 The Duke of Devonshire 17561st225 days Whig
6 The Duke of Newcastle 17572nd4 years and 332 days Whig
7 The Earl of Bute 17621st317 days Tory
8 George Grenville 17631st2 years, 85 days Whig (Grenvillite)
9 The Marquess of Rockingham 17651st1 year and 18 days Whig (Rockinghamite)
10 The Earl of Chatham 17661st2 years, 76 days Whig (Chathamite)
11 The Duke of Grafton 17681st1 year, 106 days Whig (Chathamite)
12 Lord North 17701st12 years, 58 days Tory (Northite)
13 The Marquess of Rockingham 17822nd97 days Whig (Rockinghamite)
14 The Earl of Shelburne 17821st266 days Whig (Chathamite)
15 The Duke of Portland 17831st261 days Whig / Tory (Pittite)
16 William Pitt the Younger 17831st17 years and 87 days Tory (Pittite)
17 Henry Addington 18011st3 years, 54 days Tory (Pittite)
18 William Pitt the Younger 18012nd1 year and 259 days Tory (Pittite)
19 The Lord Grenville 18061st1 year, 42 days Whig
20 The Duke of Portland 18072nd2 years and 188 days Whig / Tory (Pittite)
21 Spencer Perceval 18091st2 years, 221 days Tory (Pittite)
22 The Earl of Liverpool 18121st14 years, 305 days Tory (Pittite)
23 The Viscount Goderich 18271st144 days Tory (Canningite)
24 George Canning 18271st119 days Tory (Canningite)
25 The Duke of Wellington 18281st2 years and 299 days Tory
26 The Earl Grey 18301st3 years, 229 days Whig
27 The Viscount Melbourne 18341st122 days Whig
28 The Duke of Wellington 18342nd23 days Tory
29 Sir Robert Peel 18341st120 days Conservative
30 The Viscount Melbourne 18352nd6 years and 135 days Whig
31 Sir Robert Peel 18412nd4 years and 304 days Conservative
32 Lord John Russell 18461st5 years and 237 days Whig / Liberal
33 The Earl of Derby 18521st299 days Conservative
34 The Earl of Aberdeen 18521st2 years, 42 days Peelite
35 The Viscount Palmerston 18551st3 years and 14 days Whig / Liberal
36 The Earl of Derby 18582nd1 year and 112 days Conservative
37 The Viscount Palmerston 18592nd6 years and 129 days Whig / Liberal
38 Lord John Russell 18652nd241 days Whig / Liberal
39 The Earl of Derby 18663rd1 year and 243 days Conservative
40 Benjamin Disraeli 18681st279 days Conservative
41 William Ewart Gladstone 18681st5 years and 77 days Liberal
42 Benjamin Disraeli 18742nd6 years and 62 days Conservative
43 William Ewart Gladstone 18802nd5 years and 48 days Liberal
44 The Marquess of Salisbury 18851st220 days Conservative
45 William Ewart Gladstone 18863rd170 days Liberal
46 The Marquess of Salisbury 18862nd6 years and 18 days Conservative
47 William Ewart Gladstone 18924th1 year and 200 days Liberal
48 The Earl of Rosebery 18941st1 year, 109 days Liberal
49 The Marquess of Salisbury 18953rd7 years and 17 days Conservative
50 Arthur Balfour 19021st3 years, 145 days Conservative
51 Henry Campbell-Bannerman 19051st2 years, 122 days Liberal
52 H. H. Asquith 19081st8 years, 244 days Liberal
53 David Lloyd George 19161st5 years, 317 days Liberal
54 Bonar Law 19221st211 days Conservative (Scot. Unionist)
55 Stanley Baldwin 19231st246 days Conservative
56 Ramsay MacDonald 19241st288 days Labour / National Labour
57 Stanley Baldwin 19242nd4 years and 213 days Conservative
58 Ramsay MacDonald 19292nd6 years and 3 days Labour / National Labour
59 Stanley Baldwin 19353rd1 year and 356 days Conservative
60 Neville Chamberlain 19371st2 years, 348 days Conservative
61 Sir Winston Churchill 19401st5 years and 78 days Conservative
62 Clement Attlee 19451st6 years, 92 days Labour
63 Sir Winston Churchill 19512nd3 years and 162 days Conservative
64 Sir Anthony Eden 19551st1 year, 279 days Conservative
65 Harold Macmillan 19571st6 years, 281 days Conservative
66 Sir Alec Douglas-Home 19631st363 days Conservative (Scot. Unionist)
67 Harold Wilson 19641st5 years and 247 days Labour
68 Edward Heath 19701st3 years, 259 days Conservative
69 Harold Wilson 19742nd2 years and 33 days Labour
70 James Callaghan 19761st3 years, 29 days Labour
71 Margaret Thatcher 19791st11 years, 208 days Conservative
72 John Major 19901st6 years, 155 days Conservative
73 Tony Blair 19971st10 years, 56 days Labour
74 Gordon Brown 20071st2 years, 318 days Labour
75 David Cameron 20101st6 years, 63 days Conservative
76 Theresa May 20161st3 years, 11 days Conservative
77 Boris Johnson 20191st2 years, 10 days(incumbent) Conservative

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References

  1. "Boris Johnson becomes 55th Prime Minister of the United Kingdom".