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

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
LL54 7ZA Peblig 53.140304 -4.248171 249718 362712 SH497627
LL54 7ZB Peblig 53.140304 -4.248171 249718 362712 SH497627
LL54 7ZD Y Groeslon 53.085367 -4.250145 249394 356606 SH493566
LL54 7ZE Y Groeslon 53.085367 -4.250145 249394 356606 SH493566
LL54 7ZF Y Groeslon 53.085367 -4.250145 249394 356606 SH493566
LL54 7ZG Peblig 53.140304 -4.248171 249718 362712 SH497627
LL54 7ZN Peblig 53.140294 -4.248185 249717 362711 SH497627
LL54 7ZS Peblig 53.140304 -4.248171 249718 362712 SH497627
LL54 7ZW Waunfawr 53.095357 -4.18744 253627 357587 SH536575
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 53.144972 -4.269844 248285 363277 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 53.14567 -4.262478 248780 363339 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 1DZ Bethel a'r Felinheli 53.164443 -4.207394 252528 365312 SH525653
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 1EQ Canol Tref Caernarfon 53.140664 -4.27464 247949 362808 SH479628
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
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