Postcodes in Gwynedd page 40 Unitary Authority

  1. All administrative areas

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/

Wards in this Unitary Authority
Aberdyfi ,   Abererch ,   Abermaw ,   Abersoch gyda Llanengan ,   Arllechwedd ,   Arthog a Llangelynnin ,   Bethel a'r Felinheli ,   Bowydd a'r Rhiw ,   Brithdir and Llanfachreth/Ganllwyd/Llanelltyd ,   Bro Dysynni ,   Cadnant ,   Canol Bangor ,   Canol Bethesda ,   Canol Tref Caernarfon ,   Clynnog ,   Corris a Mawddwy ,   Criccieth ,   Cwm-y-glo ,   De Dolgellau ,   De Pwllheli ,   Deiniolen ,   Dewi ,   Diffwys a Maenofferen ,   Dolbenmaen ,   Dwyrain Bangor ,   Dwyrain Porthmadog ,   Dyffryn Ardudwy ,   Efailnewydd a Buan ,   Gerlan ,   Glaslyn ,   Glyder ,   Gogledd Dolgellau ,   Gogledd Pwllheli ,   Gorllewin Porthmadog ,   Gorllewin Tywyn ,   Harlech a Llanbedr ,   Hendre ,   Llanbedrog gyda Mynytho ,   Llanberis ,   Llandderfel ,   Llanllyfni ,   Llanrug ,   Llanuwchllyn ,   Llanwnda ,   Llanystumdwy ,   Menai ,   Morfa Nefyn a Thudweiliog ,   Morfa Tywyn ,   Nefyn ,   Peblig ,   Pen draw Llŷn ,   Pen-y-groes ,   Penisa'r-waun ,   Penrhyndeudraeth ,   Rachub ,   Teigl ,   Trawsfynydd ,   Tre-garth a Mynydd Llandygái ,   Tryfan ,   Waunfawr ,   Y Bala ,   Y Bontnewydd ,   Y Faenol ,   Y Groeslon ,   Yr Eifl
Parishes in this Unitary Authority
Aber ,   Aberdaron ,   Aberdovey ,   Arthog ,   Bala ,   Bangor ,   Barmouth ,   Beddgelert ,   Bethesda ,   Betws Garmon ,   Bontnewydd ,   Botwnnog ,   Brithdir and Llanfachreth ,   Bryn-crug ,   Buan ,   Caernarfon ,   Clynnog ,   Corris ,   Criccieth ,   Dolbenmaen ,   Dolgellau ,   Dyffryn Ardudwy ,   Ffestiniog ,   Ganllwyd ,   Harlech ,   Llanbedr ,   Llanbedrog ,   Llanberis ,   Llanddeiniolen ,   Llandderfel ,   Llandwrog ,   Llandygai ,   Llanegryn ,   Llanelltyd ,   Llanengan ,   Llanfair ,   Llanfihangel-y-Pennant ,   Llanfrothen ,   Llangelynnin ,   Llangywer ,   Llanllechid ,   Llanllyfni ,   Llannor ,   Llanrug ,   Llanuwchllyn ,   Llanwnda ,   Llanycil ,   Llanystumdwy ,   Maentwrog ,   Mawddwy ,   Nefyn ,   Pennal ,   Penrhyndeudraeth ,   Pentir ,   Pistyll ,   Porthmadog ,   Pwllheli ,   Talsarnau ,   Trawsfynydd ,   Trefor a Llanaelhaearn ,   Tudweiliog ,   Tywyn ,   Waunfawr ,   Y Felinheli
Key Active postcodeActive postcode Postcode no longer in usePostcode no longer in use

Postcode Ward Latitude Longitude Easting Northing Grid ref
LL54 6LA Llanllyfni 53.052965 -4.262423 248458 353028 SH484530
LL54 6LB Llanllyfni 53.052817 -4.262624 248444 353012 SH484530
LL54 6LD Llanllyfni 53.0534 -4.265042 248284 353082 SH482530
LL54 6LE Llanllyfni 53.055813 -4.256826 248843 353333 SH488533
LL54 6LF Llanllyfni 53.060482 -4.249578 249345 353837 SH493538
LL54 6LG Llanllyfni 53.060649 -4.248856 249394 353854 SH493538
LL54 6LL Llanllyfni 53.057149 -4.266492 248200 353502 SH481535
LL54 6LP Pen-y-groes 53.054103 -4.283762 247031 353200 SH470531
LL54 6LQ Pen-y-groes 53.054029 -4.284369 246991 353193 SH469531
LL54 6LR Pen-y-groes 53.05345 -4.283593 247041 353127 SH470531
LL54 6LS Pen-y-groes 53.052316 -4.284144 247000 353002 SH469530
LL54 6LT Pen-y-groes 53.052316 -4.284144 247000 353002 SH469530
LL54 6LU Pen-y-groes 53.053878 -4.283317 247061 353174 SH470531
LL54 6LW Pen-y-groes 53.054226 -4.283455 247053 353213 SH470532
LL54 6LY Pen-y-groes 53.051809 -4.281969 247144 352941 SH471529
LL54 6NA Pen-y-groes 53.052316 -4.284144 247000 353002 SH469530
LL54 6NB Pen-y-groes 53.052316 -4.284144 247000 353002 SH469530
LL54 6ND Pen-y-groes 53.051983 -4.284619 246967 352966 SH469529
LL54 6NE Pen-y-groes 53.051442 -4.28565 246896 352908 SH468529
LL54 6NF Pen-y-groes 53.052287 -4.285635 246900 353002 SH468530
LL54 6NG Pen-y-groes 53.05296 -4.284761 246960 353075 SH469530
LL54 6NH Pen-y-groes 53.052335 -4.285459 246911 353007 SH469530
LL54 6NL Pen-y-groes 53.052258 -4.287126 246800 353002 SH467530
LL54 6NN Pen-y-groes 53.052973 -4.286432 246849 353080 SH468530
LL54 6NP Pen-y-groes 53.05269 -4.288074 246738 353052 SH467530
LL54 6NR Pen-y-groes 53.053286 -4.287941 246749 353118 SH467531
LL54 6NS Pen-y-groes 53.051599 -4.29009 246599 352935 SH465529
LL54 6NT Pen-y-groes 53.046633 -4.289767 246603 352382 SH466523
LL54 6NU Pen-y-groes 53.053615 -4.285303 246926 353149 SH469531
LL54 6NW Pen-y-groes 53.052454 -4.287226 246794 353024 SH467530
LL54 6NX Pen-y-groes 53.055278 -4.283928 247025 353331 SH470533
LL54 6NY Pen-y-groes 53.054887 -4.286041 246882 353292 SH468532
LL54 6NZ Pen-y-groes 53.051588 -4.288806 246685 352931 SH466529
LL54 6PA Pen-y-groes 53.053612 -4.284526 246979 353147 SH469531
LL54 6PB Pen-y-groes 53.045882 -4.30396 245649 352329 SH456523
LL54 6PD Pen-y-groes 53.052494 -4.307492 245435 353072 SH454530
LL54 6PE Pen-y-groes 53.058417 -4.295556 246257 353705 SH462537
LL54 6PF Pen-y-groes 53.052065 -4.286922 246812 352980 SH468529
LL54 6PG Pen-y-groes 53.055937 -4.283784 247037 353404 SH470534
LL54 6PH Pen-y-groes 53.054299 -4.283891 247024 353222 SH470532
LL54 6PJ Pen-y-groes 53.05634 -4.283417 247063 353448 SH470534
LL54 6PL Pen-y-groes 53.055311 -4.283139 247078 353333 SH470533
LL54 6PN Pen-y-groes 53.057255 -4.284436 246998 353552 SH469535
LL54 6PP Pen-y-groes 53.057776 -4.28215 247153 353605 SH471536
LL54 6PR Pen-y-groes 53.057671 -4.281025 247228 353591 SH472535
LL54 6PS Pen-y-groes 53.058658 -4.281137 247224 353701 SH472537
LL54 6PT Llanllyfni 53.060319 -4.263853 248388 353849 SH483538
LL54 6PU Pen-y-groes 53.058476 -4.271875 247844 353661 SH478536
LL54 6PW Pen-y-groes 53.056959 -4.282525 247125 353515 SH471535
LL54 6PY Llanllyfni 53.053613 -4.270843 247896 353118 SH478531
LL54 6RA Pen-y-groes 53.056681 -4.28157 247188 353482 SH471534
LL54 6RE Pen-y-groes 53.054813 -4.280979 247221 353273 SH472532
LL54 6RF Pen-y-groes 53.05606 -4.277821 247437 353405 SH474534
LL54 6RG Pen-y-groes 53.055345 -4.275754 247573 353321 SH475533
LL54 6RH Pen-y-groes 53.055453 -4.278058 247419 353338 SH474533
LL54 6RL Pen-y-groes 53.054285 -4.278026 247417 353208 SH474532
LL54 6RN Pen-y-groes 53.050844 -4.278367 247382 352826 SH473528
LL54 6RP Llanllyfni 53.044745 -4.271958 247790 352134 SH477521
LL54 6RR Llanllyfni 53.045965 -4.257475 248765 352239 SH487522
LL54 6RS Llanllyfni 53.044424 -4.254307 248972 352061 SH489520
LL54 6RT Llanllyfni 53.039131 -4.251823 249120 351467 SH491514
LL54 6RU Clynnog 53.030483 -4.252177 249066 350506 SH490505
LL54 6RW Pen-y-groes 53.051956 -4.27947 247312 352952 SH473529
LL54 6RY Llanllyfni 53.034581 -4.268873 247961 350997 SH479509
LL54 6SA Llanllyfni 53.035911 -4.273582 247649 351155 SH476511
LL54 6SB Llanllyfni 53.040138 -4.271686 247792 351621 SH477516
LL54 6SD Pen-y-groes 53.055142 -4.282563 247116 353313 SH471533
LL54 6SG Llanllyfni 53.042872 -4.282899 247050 351949 SH470519
LL54 6SH Llanllyfni 53.041612 -4.282967 247041 351809 SH470518
LL54 6SL Llanllyfni 53.043015 -4.282489 247078 351964 SH470519
LL54 6SN Llanllyfni 53.042487 -4.283281 247023 351907 SH470519
LL54 6SP Llanllyfni 53.04007 -4.284138 246957 351640 SH469516
LL54 6SR Llanllyfni 53.040124 -4.285528 246864 351649 SH468516
LL54 6SS Llanllyfni 53.041708 -4.285001 246904 351824 SH469518
LL54 6ST Llanllyfni 53.041379 -4.294158 246290 351807 SH462518
LL54 6SU Llanllyfni 53.035062 -4.289765 246562 351095 SH465510
LL54 6SW Llanllyfni 53.040768 -4.283832 246980 351717 SH469517
LL54 6SY Clynnog 53.026184 -4.298302 245958 350126 SH459501
LL54 6TA Clynnog 53.013888 -4.292997 246270 348747 SH462487
LL54 6TF Waunfawr 53.054246 -4.13574 256952 352910 SH569529
LL54 6TG Waunfawr 53.053918 -4.135978 256935 352874 SH569528
LL54 6TH Waunfawr 53.053385 -4.136115 256924 352815 SH569528
LL54 6TL Waunfawr 53.05384 -4.136287 256914 352866 SH569528
LL54 6TN Waunfawr 53.052478 -4.134563 257025 352711 SH570527
LL54 6TP Waunfawr 53.054422 -4.13642 256907 352931 SH569529
LL54 6TU Pen-y-groes 53.052386 -4.284208 246996 353010 SH469530
LL54 6TW Waunfawr 53.03643 -4.120436 257919 350898 SH579508
LL54 6WH Dolbenmaen 52.983815 -4.308179 245143 345435 SH451454
LL54 6XA Dolbenmaen 52.983815 -4.308179 245143 345435 SH451454
LL54 6ZA Peblig 53.140304 -4.248171 249718 362712 SH497627
LL54 6ZB Llanllyfni 53.052333 -4.268224 248067 352970 SH480529
LL54 6ZD Llanllyfni 53.052333 -4.268224 248067 352970 SH480529
LL54 6ZE Llanllyfni 53.052333 -4.268224 248067 352970 SH480529
LL54 6ZF Llanllyfni 53.052333 -4.268224 248067 352970 SH480529
LL54 6ZG Llanllyfni 53.052333 -4.268224 248067 352970 SH480529
LL54 6ZH Peblig 53.140294 -4.248185 249717 362711 SH497627
LL54 6ZU Peblig 53.140304 -4.248171 249718 362712 SH497627
LL54 6ZY Peblig 53.140304 -4.248171 249718 362712 SH497627
LL54 7AA Tryfan 53.072802 -4.248504 249460 355205 SH494552
LL54 7AB Tryfan 53.072571 -4.248358 249469 355179 SH494551
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




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