Postcodes in Gwynedd page 44 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

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
LL55 1LR Menai 53.152623 -4.260914 248909 364109 SH489641
LL55 1LS Menai 53.154239 -4.25913 249034 364285 SH490642
LL55 1LW Menai 53.151574 -4.263566 248728 363998 SH487639
LL55 1NA Peblig 53.140217 -4.268397 248365 362745 SH483627
LL55 1NB Peblig 53.140746 -4.267991 248394 362803 SH483628
LL55 1ND Peblig 53.140247 -4.269176 248313 362750 SH483627
LL55 1NE Peblig 53.139998 -4.269013 248323 362722 SH483627
LL55 1NF Canol Tref Caernarfon 53.139783 -4.270841 248200 362702 SH481627
LL55 1NG Canol Tref Caernarfon 53.139783 -4.270841 248200 362702 SH481627
LL55 1NH Canol Tref Caernarfon 53.139726 -4.273828 248000 362702 SH479627
LL55 1NL Canol Tref Caernarfon 53.138857 -4.272287 248100 362602 SH480626
LL55 1NN Canol Tref Caernarfon 53.140096 -4.27328 248038 362742 SH480627
LL55 1NP Canol Tref Caernarfon 53.139752 -4.272977 248057 362703 SH480627
LL55 1NR Canol Tref Caernarfon 53.142421 -4.273971 248000 363002 SH479630
LL55 1NS Canol Tref Caernarfon 53.14051 -4.272793 248072 362787 SH480627
LL55 1NT Canol Tref Caernarfon 53.140596 -4.27537 247900 362802 SH478628
LL55 1NU Canol Tref Caernarfon 53.140567 -4.276863 247800 362802 SH477628
LL55 1NW Canol Tref Caernarfon 53.140277 -4.272796 248071 362761 SH480627
LL55 1NY Canol Tref Caernarfon 53.142421 -4.273971 248000 363002 SH479630
LL55 1PA Menai 53.141053 -4.270728 248212 362843 SH482628
LL55 1PB Menai 53.141352 -4.270625 248220 362876 SH482628
LL55 1PD Menai 53.14158 -4.270936 248200 362902 SH481629
LL55 1PE Menai 53.141531 -4.271128 248187 362897 SH481628
LL55 1PF Menai 53.142228 -4.269953 248268 362972 SH482629
LL55 1PG Menai 53.142253 -4.268624 248357 362972 SH483629
LL55 1PH Menai 53.142062 -4.269227 248316 362952 SH483629
LL55 1PL Menai 53.141791 -4.269736 248281 362923 SH482629
LL55 1PN Menai 53.141435 -4.269074 248324 362882 SH483628
LL55 1PP Canol Tref Caernarfon 53.14082 -4.273034 248057 362822 SH480628
LL55 1PR Canol Tref Caernarfon 53.140935 -4.273653 248016 362836 SH480628
LL55 1PS Cadnant 53.14308 -4.25968 248958 363045 SH489630
LL55 1PT Menai 53.140762 -4.269951 248263 362809 SH482628
LL55 1PU Cadnant 53.143061 -4.258274 249052 363040 SH490630
LL55 1PW Menai 53.141326 -4.268709 248348 362869 SH483628
LL55 1QL Canol Tref Caernarfon 53.140749 -4.272088 248120 362812 SH481628
LL55 1RB Canol Tref Caernarfon 53.139976 -4.274858 247932 362732 SH479627
LL55 1RD Canol Tref Caernarfon 53.140428 -4.274748 247941 362782 SH479627
LL55 1RE Bethel a'r Felinheli 53.164156 -4.213124 252144 365292 SH521652
LL55 1RF Canol Tref Caernarfon 53.140224 -4.275529 247888 362761 SH478627
LL55 1RG Canol Tref Caernarfon 53.140909 -4.275446 247896 362837 SH478628
LL55 1RH Canol Tref Caernarfon 53.140838 -4.275861 247868 362830 SH478628
LL55 1RL Canol Tref Caernarfon 53.140567 -4.276863 247800 362802 SH477628
LL55 1RN Canol Tref Caernarfon 53.140636 -4.277525 247756 362811 SH477628
LL55 1RP Canol Tref Caernarfon 53.139669 -4.276816 247800 362702 SH477627
LL55 1RR Canol Tref Caernarfon 53.140268 -4.276085 247851 362767 SH478627
LL55 1RS Cadnant 53.143974 -4.259009 249006 363143 SH490631
LL55 1RT Canol Tref Caernarfon 53.141278 -4.276871 247802 362881 SH478628
LL55 1RU Canol Tref Caernarfon 53.141652 -4.276577 247823 362922 SH478629
LL55 1RW Canol Tref Caernarfon 53.14101 -4.27581 247872 362849 SH478628
LL55 1RY Canol Tref Caernarfon 53.141012 -4.273388 248034 362844 SH480628
LL55 1SA Canol Tref Caernarfon 53.141737 -4.27682 247807 362932 SH478629
LL55 1SB Cadnant 53.148007 -4.255393 249262 363584 SH492635
LL55 1SD Canol Tref Caernarfon 53.139641 -4.278309 247700 362702 SH476627
LL55 1SE Canol Tref Caernarfon 53.140459 -4.276902 247797 362790 SH477627
LL55 1SF Canol Tref Caernarfon 53.139641 -4.278309 247700 362702 SH476627
LL55 1SG Canol Tref Caernarfon 53.139694 -4.278357 247697 362708 SH476627
LL55 1SH Canol Tref Caernarfon 53.140255 -4.277206 247776 362768 SH477627
LL55 1SL Canol Tref Caernarfon 53.139786 -4.277779 247736 362717 SH477627
LL55 1SN Canol Tref Caernarfon 53.140641 -4.278183 247712 362813 SH477628
LL55 1SP Canol Tref Caernarfon 53.141466 -4.277344 247771 362903 SH477629
LL55 1SQ Canol Tref Caernarfon 53.143478 -4.275088 247929 363122 SH479631
LL55 1SR Canol Tref Caernarfon 53.142158 -4.277859 247739 362981 SH477629
LL55 1SS Canol Tref Caernarfon 53.142052 -4.276792 247810 362967 SH478629
LL55 1ST Canol Tref Caernarfon 53.141377 -4.274962 247930 362888 SH479628
LL55 1SU Canol Tref Caernarfon 53.141593 -4.275422 247900 362913 SH478629
LL55 1SW Canol Tref Caernarfon 53.141181 -4.277673 247748 362872 SH477628
LL55 1SY Canol Tref Caernarfon 53.141887 -4.274615 247955 362944 SH479629
LL55 1SZ Canol Tref Caernarfon 53.141274 -4.274688 247948 362876 SH479628
LL55 1TA Canol Tref Caernarfon 53.141828 -4.275823 247874 362940 SH478629
LL55 1TB Canol Tref Caernarfon 53.142328 -4.274579 247959 362993 SH479629
LL55 1TD Canol Tref Caernarfon 53.14268 -4.274553 247962 363032 SH479630
LL55 1TE Canol Tref Caernarfon 53.143291 -4.275512 247900 363102 SH478631
LL55 1TF Canol Tref Caernarfon 53.143291 -4.275512 247900 363102 SH478631
LL55 1TG Canol Tref Caernarfon 53.142503 -4.275336 247909 363014 SH479630
LL55 1TH Canol Tref Caernarfon 53.14455 -4.275025 247937 363241 SH479632
LL55 1TL Canol Tref Caernarfon 53.140607 -4.274802 247938 362802 SH479628
LL55 1TP Menai 53.158025 -4.252897 249464 364693 SH494646
LL55 1TR Bethel a'r Felinheli 53.164548 -4.248855 249757 365410 SH497654
LL55 1TS Bethel a'r Felinheli 53.165941 -4.244125 250078 365555 SH500655
LL55 1TT Bethel a'r Felinheli 53.172783 -4.231689 250933 366290 SH509662
LL55 1TU Bethel a'r Felinheli 53.166192 -4.229327 251068 365552 SH510655
LL55 1TW Menai 53.15732 -4.257841 249131 364625 SH491646
LL55 1TY Bethel a'r Felinheli 53.171209 -4.215836 251987 366082 SH519660
LL55 1UA Cwm-y-glo 53.148981 -4.225608 251257 363630 SH512636
LL55 1UB Bethel a'r Felinheli 53.157483 -4.215189 251983 364554 SH519645
LL55 1UD Cwm-y-glo 53.1469 -4.22586 251233 363399 SH512633
LL55 1UE Bethel a'r Felinheli 53.170789 -4.241131 250295 366088 SH502660
LL55 1UH Cadnant 53.151984 -4.244294 250018 364003 SH500640
LL55 1UL Bethel a'r Felinheli 53.162012 -4.220134 251668 365068 SH516650
LL55 1UN Bethel a'r Felinheli 53.164159 -4.211074 252281 365288 SH522652
LL55 1UP Bethel a'r Felinheli 53.165064 -4.214607 252048 365396 SH520653
LL55 1UR Bethel a'r Felinheli 53.165146 -4.216496 251922 365409 SH519654
LL55 1UT Bethel a'r Felinheli 53.164733 -4.217417 251859 365365 SH518653
LL55 1UU Bethel a'r Felinheli 53.164953 -4.209425 252394 365373 SH523653
LL55 1UW Bethel a'r Felinheli 53.165639 -4.210268 252340 365451 SH523654
LL55 1UY Bethel a'r Felinheli 53.16571 -4.209374 252400 365457 SH523654
LL55 1WA Bethel a'r Felinheli 53.167353 -4.206571 252593 365634 SH525656
LL55 1YA Bethel a'r Felinheli 53.165202 -4.208136 252481 365398 SH524653
LL55 1YB Bethel a'r Felinheli 53.166809 -4.206797 252576 365574 SH525655
LL55 1YD Bethel a'r Felinheli 53.169494 -4.203583 252800 365866 SH527658
Contains OS data © Crown copyright and database right 2025
Contains Royal Mail data © Royal Mail copyright and database right 2025
Contains National Statistics data © Crown copyright and database rights 2025
Source: Office for National Statistics licensed under the Open Government Licence v.3.0
Contains data from Wikipedia covered by the Creative Commons license