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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

LL499NH

Surveyors Place

LL499PE

The Square

LL499RU

Tan Y Bryn Terrace

LL519AL

Bro Gwgan

LL519AZ

Dolbenmaen

LL519LJ

Dolbenmaen

LL520PW

Lon Tabor

LL554NL

Cwmorthin Road

LL499SY

Tandderwen Terrace

LL499YH

Beach Road

LL499YQ

Chalet Park

LL499BJ

Glaslyn

LL499BN

Garth Road

LL499SB

Hen Ffordd

LL519YY

Dolbenmaen

LL486AJ

Glaslyn

LL486LS

Park Road

LL486NQ

Pant Heulog

LL499EL

East Avenue

LL519BQ

High Street

LL486RP

Penybryn

LL499BA

Terrace Road

LL520PU

Bryn Tyddyn

LL554NH

Bryn Dinas

LL486ND

Pool Street

LL486RR

Rhiw Bethel

LL486SR

Chapel Street

LL499RY

Bryncir Terrace

LL499BU

Madoc Street

LL499DT

Bakers Lane

LL499LA

Pensyflog

LL499RN

Dublin Street

LL499TY

Church Road

LL486NF

Capel Pant

LL499AF

Dora Street

LL499PY

Craig Madog

LL499UW

Borth Road

LL519UJ

Dolbenmaen

LL486BA

Bryniau Hendre

LL486DX

Glaslyn

LL499EE

New Street

LL499HB

High Street

LL499RB

Market Square

LL499SH

Dolbenmaen

LL519PQ

Dolbenmaen

LL486DJ

Glaslyn

LL486RT

Isfryn

LL499LW

Bank Place

LL499PF

Morfa Lodge Estate

LL499UH

Tan Y Foel

LL499UU

Ffordd Morfa Bychan

LL486DL

Rock Terrace

LL499DF

Snowdon Street

LL499PG

Madoc Street

LL499SU

Glaslyn

LL499NL

Madog Street

LL499SA

Glyn Terrace

LL519HX

Lon Tabor

LL554NQ

Glaslyn

Data Sources

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