Postcodes in Gwynedd page 43 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 1AA Canol Tref Caernarfon 53.142421 -4.273971 248000 363002 SH479630
LL55 1AB Canol Tref Caernarfon 53.140123 -4.274223 247975 362747 SH479627
LL55 1AD Canol Tref Caernarfon 53.139726 -4.273828 248000 362702 SH479627
LL55 1AE Canol Tref Caernarfon 53.141194 -4.27419 247981 362866 SH479628
LL55 1AF Canol Tref Caernarfon 53.14063 -4.27407 247987 362803 SH479628
LL55 1AG Canol Tref Caernarfon 53.140787 -4.274811 247938 362822 SH479628
LL55 1AH Canol Tref Caernarfon 53.140888 -4.274697 247946 362833 SH479628
LL55 1AJ Bethel a'r Felinheli 53.165061 -4.2075 252523 365381 SH525653
LL55 1AL Canol Tref Caernarfon 53.140943 -4.274595 247953 362839 SH479628
LL55 1AN Canol Tref Caernarfon 53.141013 -4.274225 247978 362846 SH479628
LL55 1AP Canol Tref Caernarfon 53.141374 -4.274185 247982 362886 SH479628
LL55 1AQ Bethel a'r Felinheli 53.16558 -4.204714 252711 365433 SH527654
LL55 1AR Canol Tref Caernarfon 53.142664 -4.273954 248002 363029 SH480630
LL55 1AS Canol Tref Caernarfon 53.141555 -4.273656 248018 362905 SH480629
LL55 1AT Canol Tref Caernarfon 53.141365 -4.274184 247982 362885 SH479628
LL55 1AU Canol Tref Caernarfon 53.141523 -4.273923 248000 362902 SH479629
LL55 1AW Canol Tref Caernarfon 53.141543 -4.274268 247977 362905 SH479629
LL55 1AX Bethel a'r Felinheli 53.164923 -4.205234 252674 365361 SH526653
LL55 1AY Canol Tref Caernarfon 53.142508 -4.272704 248085 363009 SH480630
LL55 1AZ Bethel a'r Felinheli 53.176502 -4.192644 253555 366623 SH535666
LL55 1BA Menai 53.14433 -4.271006 248205 363208 SH482632
LL55 1BB Menai 53.14501 -4.269771 248290 363281 SH482632
LL55 1BD Menai 53.145258 -4.269933 248280 363309 SH482633
LL55 1BE Menai 53.147082 -4.268579 248377 363509 SH483635
LL55 1BF Menai 53.145285 -4.268051 248406 363308 SH484633
LL55 1BG Menai 53.146935 -4.267315 248461 363490 SH484634
LL55 1BH Menai 53.146401 -4.267526 248445 363431 SH484634
LL55 1BJ Bethel a'r Felinheli 53.167152 -4.203329 252809 365605 SH528656
LL55 1BL Menai 53.148585 -4.267073 248483 363673 SH484636
LL55 1BN Canol Tref Caernarfon 53.141897 -4.272238 248114 362940 SH481629
LL55 1BP Menai 53.142355 -4.267522 248431 362981 SH484629
LL55 1BQ Bethel a'r Felinheli 53.175257 -4.186535 253959 366472 SH539664
LL55 1BS Cadnant 53.142284 -4.266083 248527 362970 SH485629
LL55 1BT Cadnant 53.142414 -4.26443 248638 362981 SH486629
LL55 1BU Cadnant 53.142412 -4.263129 248725 362978 SH487629
LL55 1BW Canol Tref Caernarfon 53.141301 -4.273298 248041 362876 SH480628
LL55 1BX Bethel a'r Felinheli 53.166101 -4.20715 252550 365496 SH525654
LL55 1BY Cadnant 53.142983 -4.262412 248775 363040 SH487630
LL55 1BZ Canol Tref Caernarfon 53.142531 -4.275292 247912 363017 SH479630
LL55 1DA Cadnant 53.143755 -4.263424 248710 363128 SH487631
LL55 1DB Cadnant 53.142599 -4.262242 248785 362997 SH487629
LL55 1DD Cadnant 53.142579 -4.261433 248839 362993 SH488629
LL55 1DE Cadnant 53.142039 -4.262407 248772 362935 SH487629
LL55 1DF Cadnant 53.141614 -4.259693 248952 362882 SH489628
LL55 1DG Cadnant 53.14288 -4.260268 248918 363024 SH489630
LL55 1DH Cadnant 53.143113 -4.260295 248917 363050 SH489630
LL55 1DJ Cadnant 53.146115 -4.261754 248830 363387 SH488633
LL55 1DL Cadnant 53.145033 -4.259544 248974 363262 SH489632
LL55 1DN Cadnant 53.143633 -4.261773 248820 363111 SH488631
LL55 1DP Cadnant 53.145722 -4.260208 248932 363340 SH489633
LL55 1DQ Cadnant 53.145806 -4.262859 248755 363355 SH487633
LL55 1DR Cadnant 53.144145 -4.261351 248850 363167 SH488631
LL55 1DS Cadnant 53.145563 -4.260992 248879 363324 SH488633
LL55 1DT Cadnant 53.146553 -4.259549 248979 363431 SH489634
LL55 1DU Menai 53.147653 -4.258395 249060 363551 SH490635
LL55 1DW Cadnant 53.145753 -4.257622 249105 363338 SH491633
LL55 1DX Bethel a'r Felinheli 53.157737 -4.224685 251349 364602 SH513646
LL55 1DY Menai 53.148399 -4.256535 249187 363630 SH491636
LL55 1EA Cadnant 53.147617 -4.255582 249248 363541 SH492635
LL55 1EB Cadnant 53.146722 -4.259647 248973 363450 SH489634
LL55 1ED Cadnant 53.146259 -4.257978 249083 363395 SH490633
LL55 1EE Cadnant 53.142367 -4.261228 248852 362969 SH488629
LL55 1EF Cadnant 53.145897 -4.256209 249200 363351 SH491633
LL55 1EG Menai 53.143926 -4.270955 248207 363163 SH482631
LL55 1EH Menai 53.143924 -4.270566 248233 363162 SH482631
LL55 1EL Menai 53.14437 -4.269378 248314 363209 SH483632
LL55 1EN Menai 53.1486 -4.264412 248661 363669 SH486636
LL55 1EP Canol Tref Caernarfon 53.140979 -4.273192 248047 362840 SH480628
LL55 1ER Menai 53.145343 -4.268787 248357 363316 SH483633
LL55 1ES Menai 53.14523 -4.268138 248400 363302 SH483633
LL55 1ET Menai 53.144273 -4.268296 248386 363196 SH483631
LL55 1EU Menai 53.142925 -4.267792 248415 363045 SH484630
LL55 1EW Canol Tref Caernarfon 53.142421 -4.273971 248000 363002 SH479630
LL55 1EY Menai 53.144158 -4.266346 248516 363179 SH485631
LL55 1GA Bethel a'r Felinheli 53.165989 -4.203045 252824 365475 SH528654
LL55 1HA Menai 53.143421 -4.267265 248452 363099 SH484630
LL55 1HB Menai 53.144116 -4.265716 248558 363173 SH485631
LL55 1HD Cadnant 53.144226 -4.265139 248597 363184 SH485631
LL55 1HE Cadnant 53.14345 -4.265247 248587 363098 SH485630
LL55 1HF Cadnant 53.143928 -4.264256 248655 363149 SH486631
LL55 1HG Cadnant 53.143914 -4.264988 248606 363149 SH486631
LL55 1HH Cadnant 53.145039 -4.263043 248740 363270 SH487632
LL55 1HJ Menai 53.145988 -4.265605 248572 363381 SH485633
LL55 1HL Cadnant 53.144545 -4.264408 248647 363218 SH486632
LL55 1HN Menai 53.145286 -4.26515 248600 363302 SH485633
LL55 1HP Menai 53.1454 -4.265335 248588 363315 SH485633
LL55 1HR Menai 53.146185 -4.265197 248600 363402 SH485634
LL55 1HS Menai 53.147067 -4.264675 248638 363499 SH486634
LL55 1HT Menai 53.146696 -4.264775 248630 363458 SH486634
LL55 1HU Menai 53.146262 -4.266308 248526 363413 SH485634
LL55 1HW Menai 53.14589 -4.264135 248670 363367 SH486633
LL55 1HY Menai 53.144981 -4.267481 248443 363273 SH484632
LL55 1LA Menai 53.144917 -4.268046 248405 363267 SH484632
LL55 1LB Menai 53.144331 -4.26809 248400 363202 SH483632
LL55 1LE Menai 53.148868 -4.265473 248591 363701 SH485637
LL55 1LF Menai 53.150598 -4.263351 248739 363889 SH487638
LL55 1LH Canol Tref Caernarfon 53.142421 -4.273971 248000 363002 SH479630
LL55 1LL Menai 53.149534 -4.262083 248820 363768 SH488637
LL55 1LN Menai 53.149942 -4.265709 248579 363821 SH485638
LL55 1LP Menai 53.153102 -4.264051 248701 364169 SH487641
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