Postcodes in Gwynedd page 66 Unitary Authority

This page provides postcode data for the Gwynedd UK Unitary Authority.

In 2021, Gwynedd contained approximately 51,100 households with a population of about 117,400

In 2011, Gwynedd contained approximately 52,450 households with a population of about 121,818

Website: https://www.gwynedd.llyw.cymru/

Parishes in this Unitary Authority
Key Active postcodeActive postcode Postcode no longer in usePostcode no longer in use

Postcode Ward Latitude Longitude Easting Northing Grid ref
SY20 9LD Aberdyfi 52.573227 -3.941078 268552 299038 SN685990
SY20 9LE Aberdyfi 52.578989 -3.95866 267378 299711 SN673997
SY20 9LF Aberdyfi 52.614684 -3.891123 272058 303559 SH720035
SY20 9LG Aberdyfi 52.580646 -3.927812 269473 299839 SN694998
SY20 9LL Corris a Mawddwy 52.7179 -3.691232 285861 314703 SH858147
SY20 9LN Corris a Mawddwy 52.713444 -3.690408 285905 314206 SH859142
SY20 9LP Corris a Mawddwy 52.711869 -3.689874 285937 314030 SH859140
SY20 9LR Corris a Mawddwy 52.709302 -3.690811 285867 313746 SH858137
SY20 9LS Corris a Mawddwy 52.709576 -3.690496 285889 313776 SH858137
SY20 9LT Corris a Mawddwy 52.708529 -3.692039 285782 313662 SH857136
SY20 9LU Corris a Mawddwy 52.710303 -3.6919 285796 313859 SH857138
SY20 9LW Corris a Mawddwy 52.71334 -3.690138 285923 314194 SH859141
SY20 9LX Corris a Mawddwy 52.727756 -3.711176 284540 315831 SH845158
SY20 9ND Corris a Mawddwy 52.673956 -3.709206 284531 309844 SH845098
SY20 9NE Corris a Mawddwy 52.674183 -3.709112 284537 309869 SH845098
SY20 9NF Corris a Mawddwy 52.676432 -3.70775 284636 310117 SH846101
SY20 9NG Corris a Mawddwy 52.682719 -3.705687 284792 310813 SH847108
SY20 9NH Corris a Mawddwy 52.696838 -3.712927 284340 312395 SH843123
SY20 9NQ Corris a Mawddwy 52.691767 -3.696067 285466 311804 SH854118
SY20 9QA Corris a Mawddwy 52.679968 -3.717533 283984 310526 SH839105
SY20 9QH Corris a Mawddwy 52.676733 -3.708693 284573 310152 SH845101
SY20 9QJ Corris a Mawddwy 52.676219 -3.7082 284605 310094 SH846100
SY20 9QL Corris a Mawddwy 52.676673 -3.710348 284461 310148 SH844101
SY20 9QN Corris a Mawddwy 52.677375 -3.710316 284465 310226 SH844102
SY20 9QR Corris a Mawddwy 52.67921 -3.73379 282883 310468 SH828104
SY20 9QW Corris a Mawddwy 52.677167 -3.709154 284543 310201 SH845102
SY20 9QY Corris a Mawddwy 52.60134 -3.85369 274554 302009 SH745020
SY20 9QZ Corris a Mawddwy 52.603851 -3.845438 275120 302274 SH751022
SY20 9RA Corris a Mawddwy 52.610645 -3.84624 275085 303031 SH750030
SY20 9RD Corris a Mawddwy 52.6462 -3.844767 275286 306983 SH752069
SY20 9RE Corris a Mawddwy 52.652978 -3.845436 275260 307738 SH752077
SY20 9RF Corris a Mawddwy 52.654234 -3.849673 274977 307885 SH749078
SY20 9RG Corris a Mawddwy 52.663102 -3.8638 274047 308896 SH740088
SY20 9RH Corris a Mawddwy 52.669034 -3.86738 273823 309562 SH738095
SY20 9RJ Corris a Mawddwy 52.655391 -3.840614 275594 307998 SH755079
SY20 9RL Corris a Mawddwy 52.6568 -3.838485 275742 308151 SH757081
SY20 9RN Corris a Mawddwy 52.657322 -3.837295 275823 308207 SH758082
SY20 9RP Corris a Mawddwy 52.663789 -3.827777 276485 308910 SH764089
SY20 9RQ Corris a Mawddwy 52.663331 -3.864682 273989 308923 SH739089
SY20 9RR Corris a Mawddwy 52.666154 -3.823113 276808 309165 SH768091
SY20 9RS Corris a Mawddwy 52.669993 -3.820759 276977 309588 SH769095
SY20 9RT Corris a Mawddwy 52.670426 -3.820082 277024 309635 SH770096
SY20 9RU Corris a Mawddwy 52.671824 -3.820421 277005 309791 SH770097
SY20 9RW Corris a Mawddwy 52.662854 -3.829571 276362 308809 SH763088
SY20 9RX Corris a Mawddwy 52.67277 -3.819691 277058 309895 SH770098
SY20 9RY Corris a Mawddwy 52.672925 -3.818943 277109 309911 SH771099
SY20 9RZ Corris a Mawddwy 52.678125 -3.808168 277852 310471 SH778104
SY20 9SA Corris a Mawddwy 52.67974 -3.813102 277523 310659 SH775106
SY20 9SB Corris a Mawddwy 52.67619 -3.828235 276490 310290 SH764102
SY20 9SD Corris a Mawddwy 52.653385 -3.841816 275507 307777 SH755077
SY20 9SH Corris a Mawddwy 52.653519 -3.842443 275464 307793 SH754077
SY20 9SJ Corris a Mawddwy 52.65163 -3.842511 275455 307583 SH754075
SY20 9SL Corris a Mawddwy 52.652629 -3.843041 275421 307695 SH754076
SY20 9SN Corris a Mawddwy 52.652441 -3.843004 275423 307674 SH754076
SY20 9SP Corris a Mawddwy 52.654538 -3.842249 275481 307906 SH754079
SY20 9SR Corris a Mawddwy 52.654247 -3.842474 275464 307874 SH754078
SY20 9SS Corris a Mawddwy 52.654336 -3.841945 275500 307883 SH755078
SY20 9ST Corris a Mawddwy 52.689294 -3.741336 282400 311602 SH823116
SY20 9SU Corris a Mawddwy 52.654219 -3.841393 275537 307869 SH755078
SY20 9SW Corris a Mawddwy 52.654587 -3.842577 275458 307912 SH754079
SY20 9SX Corris a Mawddwy 52.654452 -3.841462 275533 307895 SH755078
SY20 9SY Corris a Mawddwy 52.654338 -3.84125 275548 307882 SH755078
SY20 9SZ Corris a Mawddwy 52.65397 -3.840614 275589 307840 SH755078
SY20 9TA Corris a Mawddwy 52.653645 -3.840142 275620 307803 SH756078
SY20 9TB Corris a Mawddwy 52.653589 -3.839667 275652 307796 SH756077
SY20 9TD Corris a Mawddwy 52.653697 -3.83908 275692 307807 SH756078
SY20 9TE Corris a Mawddwy 52.653834 -3.838967 275700 307822 SH757078
SY20 9TH Corris a Mawddwy 52.654879 -3.842899 275438 307945 SH754079
SY20 9TJ Corris a Mawddwy 52.655085 -3.841814 275511 307966 SH755079
SY20 9TL Corris a Mawddwy 52.655161 -3.843266 275413 307977 SH754079
SY20 9TN Corris a Mawddwy 52.655304 -3.843864 275373 307994 SH753079
SY20 9TP Corris a Mawddwy 52.655607 -3.844616 275323 308029 SH753080
SY20 9TQ Corris a Mawddwy 52.655345 -3.84357 275393 307998 SH753079
SY20 9TR Corris a Mawddwy 52.655735 -3.845064 275294 308044 SH752080
SY20 9TS Corris a Mawddwy 52.656279 -3.847645 275120 308109 SH751081
SY20 9TT Corris a Mawddwy 52.656909 -3.848204 275084 308180 SH750081
SY20 9TW Corris a Mawddwy 52.655405 -3.844341 275341 308006 SH753080
SY20 9WD Corris a Mawddwy 52.655387 -3.84434 275341 308004 SH753080
SY20 9WL Corris a Mawddwy 52.654461 -3.844922 275299 307902 SH752079
Contains OS data © Crown copyright and database right 2026
Contains Royal Mail data © Royal Mail copyright and database right 2026
Contains National Statistics data © Crown copyright and database rights 2026
Source: Office for National Statistics licensed under the Open Government Licence v.3.0
Contains data from Wikipedia covered by the Creative Commons license