Greater London tops the ranking, with 267 postcode districts, ahead of West Midlands and Greater Manchester. The full ranking is below, each entry linked to its page.

# County Districts
1 Greater London 267
2 West Midlands 94
3 Greater Manchester 89
4 Highland 85
5 West Yorkshire 81
6 Essex 77
7 Hampshire 77
8 Kent 76
9 Surrey 69
10 Devon 67
11 North Yorkshire 66
12 Somerset 63
13 Buckinghamshire 59
14 Staffordshire 59
15 Merseyside 57
16 Lancashire 52
17 Hertfordshire 51
18 Norfolk 51
19 Argyll and Bute 50
20 Lincolnshire 50
21 South Yorkshire 50
22 Cumbria 48
23 Gloucestershire 48
24 Cornwall 47
25 Derbyshire 44
26 Dorset 44
27 County Durham 42
28 Tyne and Wear 42
29 Cheshire 41
30 Shropshire 41
31 Suffolk 41
32 East Sussex 40
33 Warwickshire 40
34 Worcestershire 40
35 West Sussex 39
36 Cambridgeshire 36
37 Oxfordshire 35
38 Wiltshire 35
39 Northumberland 34
40 Glasgow City 32
41 Leicestershire 32
42 Berkshire 31
43 Nottinghamshire 31
44 East Riding of Yorkshire 27
45 Northamptonshire 27
46 Powys 27
47 Gwynedd 26
48 Perth and Kinross 25
49 Bedfordshire 24
50 Aberdeenshire 23
51 City of Edinburgh 23
52 Scottish Borders 23
53 Isle of Anglesey 21
54 Carmarthenshire 20
55 Pembrokeshire 20
56 Fife 18
57 Herefordshire 18
58 North Ayrshire 17
59 Conwy 16
60 Dumfries and Galloway 16
61 Ceredigion 15
62 South Lanarkshire 15
63 Bristol 14
64 North Lanarkshire 13
65 Renfrewshire 13
66 Aberdeen City 12
67 Angus 12
68 Caerphilly 12
69 East Lothian 12
70 Isle of Wight 12
71 Rhondda Cynon Taf 12
72 Stirling 12
73 Denbighshire 11
74 West Lothian 11
75 Cardiff 10
76 East Ayrshire 10
77 Flintshire 10
78 Midlothian 10
79 Neath Port Talbot 10
80 South Ayrshire 10
81 The Vale of Glamorgan 10
82 Falkirk 9
83 Moray 9
84 Na h-Eileanan an Iar 9
85 Monmouthshire 8
86 Swansea 8
87 Wrexham 8
88 Bridgend 7
89 Inverclyde 7
90 Newport 7
91 East Renfrewshire 6
92 Blaenau Gwent 5
93 Clackmannanshire 5
94 Dundee City 5
95 East Dunbartonshire 5
96 Isles of Scilly 4
97 West Dunbartonshire 4
98 Merthyr Tydfil 3
99 Orkney Islands 3
100 Rutland 3
101 Shetland Islands 3
102 Torfaen 3

Source: Royal Mail postcode data. Compiled by Postcodes UK.

Frequently asked questions

Which UK county has the most postcode districts?

Greater London tops the list, with 267 postcode districts, followed by West Midlands and Greater Manchester.

How is this ranking measured?

This ranking is based on Royal Mail postcode data. It covers the ceremonial counties of England and the council and principal areas of Scotland and Wales.