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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

LL519NX

Bro Pedr Fardd

LL486SF

Glaslyn

LL520PW

Lon Tabor

LL499NJ

Pensyflog

LL554YF

Stryd Yr Eglwys

LL499AD

Gorllewin Porthmadog

LL499NF

Tros Y Bent

LL499BA

Terrace Road

LL499NU

High Street

LL519AJ

Dolbenmaen

LL499LN

Gorllewin Porthmadog

LL499SF

Hen Ffordd

LL499PF

Morfa Lodge Estate

LL499BT

Snowdon Street

LL499RR

Bron Alltwen

LL554YN

Garreg Frech

LL519AB

Dolbenmaen

LL499YL

Ffordd Porthmadog

LL519RZ

Dolbenmaen

LL519AL

Bro Gwgan

LL499RF

High Street

LL499SS

London Terrace

LL486NG

Pool Street

LL519SZ

Dolbenmaen

LL499JN

Dwyrain Porthmadog

LL519LX

Pen Llystyn

LL499EE

New Street

LL499TA

Penrhiw Terrace

LL486ND

Pool Street

LL520RE

Dolbenmaen

LL519RX

Cambrian Terrace

LL499ED

New Street

LL486DH

Bryn Goleu

LL486LS

Park Road

LL499AN

Osmond Terrace

LL519YT

Dolbenmaen

LL499YA

Beach Road

LL486RU

Maes-Y-Garth

LL486RB

Bryn Meurig

LL486BD

Trem Y Moelwyn

LL499TU

Pilot Houses

LL486NH

Pant Heulog

LL499EY

Dwyrain Porthmadog

LL486AQ

Glaslyn

LL499PG

Madoc Street

LL499AE

High Street

LL499EN

East Avenue

LL499SL

Penamser Road

LL554YA

Church Street

LL486ST

Garreg Frech

LL499TW

Garth Road

LL499AY

Gorllewin Porthmadog

LL499AH

Gorllewin Porthmadog

LL499BW

Dora Street

LL486AJ

Glaslyn

LL486SR

Chapel Street

LL519SX

Maes Hyfryd

LL499TD

Glaslyn

LL486DJ

Glaslyn

Data Sources

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