Schools
8 open schools are in scope, including 0 primary and 0 secondary schools. Ysgol Gwaun Gynfi is the nearest published school at 967 m.
Counts describe active establishment records. They do not assess admissions, catchments or quality.
LL55 3NG
Deiniolen · Gwynedd · Wales
Updated September 2026
Compare this postcodeLocation overview
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- Post town
- Caernarfon
- Ward
- Deiniolen
- Local authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd
- Postcode district
- LL55
- Postcode sector
- LL55 3
Nearby postcodes
Complete postcode fields and official codes
- Postcode
- LL55 3NG
- Status
- Current
- Introduced
- 1 January 1980
- Terminated
- Not published
- Postcode area
- LL
- Postcode district
- LL55
- Postcode sector
- LL55 3
- Latitude
- 53.151125
- Longitude
- -4.141578
- British National Grid easting
- 256,883
- British National Grid northing
- 363,695
Statistical and administrative geographies
- Country
- Wales · W92000004
- Region
- W99999999
- Local authority district
- Gwynedd · W06000002
- Electoral ward
- Deiniolen · W05001526
- Parish or community
- W04000070
- Westminster constituency
- Dwyfor Meirionnydd · W07000096
- Output area
- W00000326
- Lower layer super output area
- Gwynedd 005A · W01000063
- Middle layer super output area
- Gwynedd 005 · W02000014
Postcode source versions
- Ordnance Survey: Code-Point Open Version 2026-08 · Current postcode units in Great Britain · OGL-3.0
- Office for National Statistics: ONS Postcode Directory Version 2026-08 · United Kingdom; Northern Ireland excluded pending rights review; Crown Dependencies outside product scope · OGL-3.0 with third-party rights
- Ordnance Survey: Boundary-Line Version 2026-05 · Local-authority boundaries in Great Britain · OS OpenData Licence
Explore LL55
Property
5 recorded
sales at this postcode
| Address | Date | Price |
|---|---|---|
| Blaen-Y-Waen Celyn, Deiniolen, Caernarfon, LL55 3NG | 28 October 2019 | £465,000 |
| Celyn Farm, Deiniolen, Caernarfon, LL55 3NG | 19 November 2012 | £95,000 |
| Celyn Uchaf House, Deiniolen, Caernarfon, LL55 3NG | 13 September 2006 | £85,000 |
Schools
Within 3.1 miles of this postcode
- Open schools
- 8
- Primary
- 0
- Secondary
- 0
- 967 m
Ysgol Gwaun Gynfi
Welsh establishment
- 1.4 km
Ysgol Gymuned Penisarwaun
Welsh establishment
- 2.6 km
Ysgol Gynradd Rhiwlas
Welsh establishment
Recorded crime
Within 1 mile of this postcode
- Published events
- 122
- Months covered
- 12
- Latest month
- June 2026
Most recorded categories in this period
- Violence and sexual offences 75
- Anti social behaviour 10
- Burglary 9
- Other theft 7
- Public order 7
Census 2021
Population and age profile
- Postcode residents
- 9
- Postcode households
- 4
- Residents per household
- 2.3
- LL55 3 residents
- 2,998
4 female, 5 male
Age bands in LL55 3
Wider postcode sector- Age 0 to 14
- 16.2%
- Age 15 to 24
- 11.6%
- Age 25 to 44
- 22.4%
- Age 45 to 64
- 30%
- Age 65 and over
- 19.8%
495 residents
355 residents
682 residents
914 residents
602 residents
This postcode contained 0.3% of the sector's usual residents on Census Day. The age profile describes the wider LL55 3 sector, not people in this individual postcode.
Small counts are adjusted for privacy, so totals can differ slightly between Census tables.
Census Day: 21 March 2021. Sources: ONS/Nomis P001-P004 and ONS CT21_0228. Age table version 2024-04-08.
Fixed broadband coverage
Ofcom's predicted availability across all residential and commercial premises in this postcode in January 2026.
- Superfast, 30 Mbit/s+
- 100%
- Ultrafast, 100 Mbit/s+
- 25%
- Ultrafast, 300 Mbit/s+
- 25%
- Gigabit-capable
- 25%
- Unable to receive decent fixed or FWA broadband
- 0%
- Next Generation Access
- 100%
- Decent broadband available from fixed wireless
- 100%
Predicted coverage, not measured speeds. Check availability for your address with a provider. Postcode-level full-fibre figures are not published in this release.
Source: Ofcom Connected Nations Spring 2026, version 2026-01-v2. Contains Ofcom data licensed under the Open Government Licence v3.0.
GP practices
1
within 5 km
THE SURGERY
LLANBERIS SURGERY, HIGH STREET, LLANBERIS, CAERNARFON, LL55 4SU
ODS code W94017
3.8 km
Main GP practices only; branch surgeries are excluded. Distances are straight-line. Contact the practice to check registration, services, opening hours and appointments.
Source acquired on 2026-09-05. Contains information from NHS England, licenced under the current version of the Open Government Licence.
Nearby transport
- 0.2 miles
Racca Crossroads
BCT · Penisar Waun
- 0.3 miles
Plas y Rhiw
BCT · Deiniolen
- 0.3 miles
Rhiwen
BCT · Rhiwen
- 0.3 miles
Plas y Rhiw
BCT · Clwt-y-bont
- 0.3 miles
Rhiwen
BCT · Rhiwen
Evidence in context
Recorded crime
122 published events cover 12 months, averaging 10.167 events per published month. The largest recorded category is Violence and sexual offences with 75 events.
The source publishes anonymised street-level events. These figures are not a measure of safety for an individual address.