Greater London tops the ranking, with 179,758 postcodes, ahead of Greater Manchester and West Yorkshire. The full ranking is below, each entry linked to its page.

# County Postcodes
1 Greater London 179,758
2 Greater Manchester 71,768
3 West Yorkshire 63,711
4 West Midlands 57,772
5 Kent 51,456
6 Hampshire 49,778
7 Essex 46,839
8 Devon 41,054
9 Lancashire 40,244
10 North Yorkshire 36,968
11 Merseyside 34,445
12 Surrey 33,658
13 South Yorkshire 33,090
14 Somerset 32,504
15 Lincolnshire 32,474
16 Hertfordshire 32,186
17 Cheshire 31,742
18 Staffordshire 29,443
19 Norfolk 28,417
20 Gloucestershire 28,231
21 Nottinghamshire 27,700
22 Tyne and Wear 27,531
23 County Durham 27,506
24 West Sussex 26,306
25 Derbyshire 26,240
26 Suffolk 25,240
27 Berkshire 23,959
28 Buckinghamshire 23,886
29 Leicestershire 22,797
30 Dorset 22,629
31 East Sussex 22,456
32 Wiltshire 22,377
33 Cambridgeshire 22,170
34 Oxfordshire 22,100
35 Cornwall 21,980
36 Cumbria 19,951
37 Shropshire 18,223
38 Northamptonshire 18,114
39 Worcestershire 16,894
40 East Riding of Yorkshire 16,519
41 Warwickshire 16,332
42 Glasgow City 15,607
43 Bedfordshire 14,744
44 City of Edinburgh 13,467
45 Northumberland 13,058
46 Bristol 11,689
47 Fife 10,261
48 Aberdeenshire 9,831
49 South Lanarkshire 8,638
50 North Lanarkshire 7,969
51 Cardiff 7,780
52 Highland 7,576
53 Dumfries and Galloway 6,890
54 Herefordshire 6,779
55 Carmarthenshire 6,714
56 Aberdeen City 6,321
57 Powys 6,167
58 Swansea 5,837
59 Gwynedd 5,590
60 Perth and Kinross 5,477
61 Rhondda Cynon Taf 5,284
62 Isle of Wight 5,120
63 Pembrokeshire 5,006
64 Renfrewshire 4,731
65 Scottish Borders 4,512
66 Flintshire 4,498
67 Dundee City 4,466
68 Caerphilly 4,370
69 Wrexham 4,337
70 North Ayrshire 4,225
71 West Lothian 4,195
72 Falkirk 4,158
73 Conwy 4,124
74 Angus 4,006
75 East Ayrshire 3,978
76 Neath Port Talbot 3,649
77 Newport 3,640
78 South Ayrshire 3,594
79 Argyll and Bute 3,418
80 Denbighshire 3,401
81 Bridgend 3,378
82 Moray 3,355
83 Monmouthshire 3,299
84 East Dunbartonshire 3,260
85 East Lothian 3,208
86 Ceredigion 3,087
87 Midlothian 3,014
88 The Vale of Glamorgan 3,014
89 Stirling 2,917
90 Isle of Anglesey 2,884
91 Torfaen 2,577
92 East Renfrewshire 2,519
93 West Dunbartonshire 2,397
94 Inverclyde 2,328
95 Blaenau Gwent 1,844
96 Merthyr Tydfil 1,625
97 Rutland 1,451
98 Clackmannanshire 1,335
99 Na h-Eileanan an Iar 975
100 Orkney Islands 734
101 Shetland Islands 652
102 Isles of Scilly 20

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

Frequently asked questions

Which UK county has the most postcodes?

Greater London tops the list, with 179,758 postcodes, followed by Greater Manchester and West Yorkshire.

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.