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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 None deprivation and high crime levels, with around 73 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
7/10
Crimes per 1k residents
73
Deprivation level
N/A
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
41.74(+23%)
Anti-social behaviour
20.57(+58%)
Public order
9.01(+10%)
Shoplifting
8.56(+33%)
Criminal damage and arson
8.26(+13%)
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 69 recent sales, the median property price is £220,000 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
Detached25£282,500
Terraced34£188,750
Semi-Detached7£190,000
Flats3£150,000

10 years median price trend in Porthmadog

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

All postcodes in Porthmadog

LL519NQ

Dolbenmaen

LL486DZ

Garreg Frech

LL486BG

Cae Mawr

LL486NR

Pool Street

LL554NA

Sygun Terrace

LL520PU

Bryn Tyddyn

LL486SW

Garreg Frech

LL486PU

Penrhyndeudraeth

LL486PW

High Street

LL519HX

Lon Tabor

LL554LY

Gwynant Street

LL486RP

Penybryn

LL486AZ

Glaslyn

LL499PE

The Square

LL499ST

Bryn Eglwys

LL519PQ

Dolbenmaen

LL499RH

Dublin Street

LL499DB

Madoc Street

LL499LU

Gorllewin Porthmadog

LL499GB

Penamser Road

LL486SP

Glaslyn

LL499BD

Hill Street

LL499EU

High Street

LL499SP

Glaslyn

LL499YN

Penamser Road

LL499YB

Beach Road

LL519UQ

Dolbenmaen

LL486AX

Garreg Frech

LL499AU

Limekiln Cottages

LL486DY

Garreg Frech

LL499EG

Glaslyn Street

LL499NH

Surveyors Place

LL499EH

Cambrian Terrace

LL499DH

Heol-Y-Wyddfa

LL486SH

Garreg Frech

LL499RL

Sunnyside

LL486BQ

Morfa Gaseg

LL486RL

Penrhyndeudraeth

LL519RQ

Dolbenmaen

LL499EB

Chandlers Place

LL519NJ

Dolbenmaen

LL499UW

Borth Road

LL499DN

Chapel Street

LL486PL

Penrhyndeudraeth

LL499UG

Ffordd Morfa Bychan

LL499LE

Maes Gerddi

LL486BZ

Garreg Frech

LL499SU

Glaslyn

LL499RN

Dublin Street

LL499NL

Madog Street

LL486BB

Bryn Islwyn

LL499YJ

Cae Eithin

LL499HG

Penamser Road

LL499TB

Stepiau

LL499SH

Dolbenmaen

LL499BY

Back Snowdon Street

LL486LJ

Glaslyn

LL554NE

Stryd Gwynant

LL499HB

High Street

LL554NH

Bryn Dinas

LL554NF

Old Tanrhiw

LL486PS

Penrhyndeudraeth

LL499BB

Borth Road

LL499PT

Isgraig

LL499BL

Marine Terrace

LL499UP

Borth Road

LL499DD

Garden Place

LL499RG

Tan Y Graig

LL499YF

Ffordd Morfa Bychan

LL499LR

High Street

LL499TT

Amanda Terrace

LL499UR

Morfa Bychan Road

LL545DP

Dolbenmaen

LL486SG

Tanlan

LL499AG

Mount Pleasant

LL486SN

Glaslyn

LL554UU

Glaslyn

LL499BN

Garth Road

LL486BJ

Morfa Gaseg

LL499RE

Factory Place

LL499DP

Epworth Villas

LL499BG

Garth Road

LL520RB

Lon Tabor

LL499PS

Church Street

LL486DF

High Street

LL554YG

Bryn Ffynnon

LL499DW

Tanner Terrace

LL499PH

Dwyrain Porthmadog

LL499YD

Garreggoch Cottages

LL499HF

Penamser Road

LL554NQ

Glaslyn

LL499NY

Penamser Road

LL499SG

Hen Ffordd

LL499DG

Saw Mill

LL499LB

Pensyflog

LL554YB

Stryd Yr Eglwys

LL499LL

Gorllewin Porthmadog

LL499RS

Dolbenmaen

LL554NG

Stryd Gwynant

LL499HT

Dwyrain Porthmadog

Data Sources

All data is sourced from official UK government agencies and public datasets. Last updated: 16/05/2026.