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Porthmadog

Interactive map displaying Porthmadog

About

Porthmadog sits on the Glaslyn estuary on the coast of Gwynedd, where a harbour and quays were built to serve the 19th-century slate trade. The town grew around maritime and railway links; a raised embankment known as the Cob holds back Traeth Mawr, creating reclaimed land and a straight causeway toward Black Rock Sands. The harbour front retains workshops, slipways and warehouses that reflect its role as an export port, with the river channel curving toward the sea and mudflats and salt marshes at low tide.

Steam trains of the narrow-gauge Ffestiniog Railway begin at Porthmadog Harbour and climb into the hills toward former slate quarries, crossing timber viaducts and passing through small stations. The town functions as a local service centre for surrounding villages and as a gateway for coastal paths and estuary walks; fishing boats, yachts and working craft share space with heritage vessels. Seasonal birdlife uses the mudflats and channels, and tidal patterns shape shoreline access and local marshalling of boats.

Area overview

On average Porthmadog has moderate deprivation and moderate crime levels, with around 68 crimes per 1,000 residents per year. Approximately 12.1% of homes in this area are social housing provided by a local council or housing association. The average income per household in Porthmadog is £42,768 per year. Porthmadog is home to around 6,660 people, with a population density of about 28.5 per km2.

Crime rate
6/10
Crimes per 1k residents
68
Deprivation level
4/10
Income level
5/10
Social housing
12.1%
Connectivity
N/A

Area Profile

Porthmadog Population
6,660
Population density
28.5 per km²

Crime

Crime per 1,000 population

Violence and sexual offences
40.99(+12%)
Anti-social behaviour
20.57(+42%)
Public order
7.66(-14%)
Shoplifting
7.06(+2%)
Criminal damage and arson
6.91(-14%)
Wales average

Demographics

Ethnic groups

British
6,326
94.98%
Other White
150
2.25%
Irish
27
0.41%
White and Asian (mixed)
25
0.38%
Other Asian
23
0.35%
Total population: 6,660

Economics

Education (age 16+)

Level 4+ (Degree)
1,893
33.6%
Level 3 (A level)
934
16.58%
No qualifications
929
16.49%
Level 2 (GCSEs 9-4)
840
14.91%
Level 1 (GCSEs 3-1)
451
8%
Total 16+ residents: 5,634

Housing

Housing tenure

Owns outright
1,558
50.88%
Owns with a mortgage
574
18.75%
Private landlord or letting agency
343
11.2%
Other social rented
318
10.39%
Other forms of private rent
136
4.44%
Total households: 3,062

Property prices in Porthmadog

Based on 66 recent sales, the median property price is £226,500 in Porthmadog area, with individual transactions ranging from £54,000 up to £554,000.

Price distribution per property type (last year)

Price distribution by property type for Porthmadog in the last year.

Median sale price and percentiles per property type (last year)

Median sale price, sales count, and percentile information for each property type in Porthmadog over the last year.
TypeSalesMedian
Detached26£290,000
Flats5£162,500
Semi-Detached5£190,000
Terraced30£181,000

10 years median price trend in Porthmadog

Ten year median sale price trend for each property type in Porthmadog.

All postcodes in Porthmadog

LL486HR

Glaslyn

LL486RF

Penrhyndeudraeth

LL486SN

Glaslyn

LL499DP

Epworth Villas

LL499EB

Chandlers Place

LL499GB

Penamser Road

LL499NN

Snowdon Place

LL519SJ

Dolbenmaen

LL486NG

Pool Street

LL499EF

Eryri Terrace

LL499HW

Church Street

LL499TR

Sea View Terrace

LL519UX

Dolbenmaen

LL486BD

Trem Y Moelwyn

LL499HN

Railway Place

LL519AQ

Dolbenmaen

LL486NR

Pool Street

LL499DH

Heol-Y-Wyddfa

LL499EP

Heol-Y-Wyddfa

LL499LE

Maes Gerddi

LL499NB

Britannia Terrace

LL499TA

Penrhiw Terrace

LL499UG

Ffordd Morfa Bychan

LL499UR

Morfa Bychan Road

LL519EZ

Lon Goed

LL499YU

Tyddyn Adi

LL486PL

Penrhyndeudraeth

LL499AT

Corn Hill

LL499BD

Hill Street

LL499SW

Tan Y Bryn Terrace

LL499YD

Garreggoch Cottages

LL520RE

Dolbenmaen

LL554YW

Oberon Woods

LL486DW

High Street

LL486NL

Pool Street

LL499DU

Madoc Street West

LL499LR

High Street

LL499PS

Church Street

LL499UE

Tan Y Foel

LL519TQ

Dolbenmaen

LL486DA

High Street

LL486PS

Penrhyndeudraeth

LL499AS

Oakley Wharf

LL499DB

Madoc Street

LL499RP

Dolbenmaen

LL519HZ

Dolbenmaen

LL519LQ

Dolbenmaen

LL519SQ

Dolbenmaen

LL486BJ

Morfa Gaseg

LL499DN

Chapel Street

LL499EJ

Glaslyn Street

LL519SX

Maes Hyfryd

LL554YA

Church Street

LL554YD

Dolfair

LL499BH

Roche Terrace

LL499HS

Heol-Y-Wyddfa

LL499PT

Isgraig

LL499UA

Ralph Street

LL499YR

Y Ffridd

LL519TX

Dolbenmaen

LL499LN

Gorllewin Porthmadog

LL486PU

Penrhyndeudraeth

LL499DS

Chapel Street

LL499EU

High Street

LL499LB

Pensyflog

LL499RG

Tan Y Graig

LL499SL

Penamser Road

LL486PR

Nazareth Terrace

LL499DR

Chapel Street

LL499HU

Meadow Drive

LL499YA

Beach Road

LL499YG

Main Drive

LL499PQ

Heol-Y-Wyddfa

LL486DZ

Garreg Frech

LL499AU

Limekiln Cottages

LL499BB

Borth Road

LL499TF

Glaslyn

LL519YU

Lon Tabor

LL554YL

Stryd Yr Eglwys

LL486DQ

Glaslyn

LL486DS

High Street

LL486RS

Tynffrwd Terrace

LL499RW

Glanmorfa Terrace

LL499YJ

Cae Eithin

LL519LX

Pen Llystyn

LL486RL

Penrhyndeudraeth

LL486SS

Cwmorthin Road

LL499PU

Isgraig

LL499RD

High Street

LL519TJ

Dolbenmaen

LL499AY

Gorllewin Porthmadog

LL499EN

East Avenue

LL499PA

Penamser Road

LL499PB

The Crescent

LL554NF

Old Tanrhiw

LL554NS

Glaslyn

LL499NG

Tros Y Bent

LL499NJ

Pensyflog

LL499PH

Dwyrain Porthmadog

LL499TT

Amanda Terrace

Data Sources

All data is sourced from official UK government agencies and public datasets. Last updated: 16/01/2026.