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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

LL486SS

Cwmorthin Road

LL486RD

Ffridd Uchaf

LL486PG

Blaen Ddol

LL499BH

Roche Terrace

LL486BH

Morfa Gaseg

LL519AQ

Dolbenmaen

LL486DN

Railway Terrace

LL499DT

Bakers Lane

LL519BQ

High Street

LL486LE

Griffin Industrial Estate

LL499YW

Ffordd Morfa Bychan

LL554NS

Glaslyn

LL519UX

Dolbenmaen

LL499YH

Beach Road

LL499BF

Dwyrain Porthmadog

LL499TP

Sea View Terrace

LL486RR

Rhiw Bethel

LL486BX

Garreg Frech

LL499PW

Pensyflog

LL499LD

Pensyflog

LL499BU

Madoc Street

LL519NZ

London Road

LL499PD

Tuhwnt-Ir-Bwlch

LL486BE

Cae Mawr

LL499EQ

Dwyrain Porthmadog

LL499SE

Tan Rhiw

LL499YR

Y Ffridd

LL486RT

Isfryn

LL486DP

Bwlch Goleu

LL499RT

Hen Ffordd

LL499HN

Railway Place

LL499EW

Hughendon Cottages

LL520RF

Dolbenmaen

LL554YJ

Cae Morys

LL486DR

Glaslyn

LL486RN

Ty Fry Terrace

LL554YW

Oberon Woods

LL554NR

Glaslyn

LL499RW

Glanmorfa Terrace

LL499HD

High Street

LL486NE

Bryn Llewelyn Estate

LL499SB

Hen Ffordd

LL499UF

Heol Merswy

LL499PU

Isgraig

LL554LU

Gwynant Street

LL499AL

Osmond Lane

LL519AX

Ffordd Cors Y Llyn

LL554NT

Glaslyn

LL486PT

Tanybanc

LL486DT

Penrhyndeudraeth

LL499HY

Meadow Drive

LL519SQ

Dolbenmaen

LL499NB

Britannia Terrace

LL519YU

Golan

LL486RH

Penrhyndeudraeth

LL520RA

Trer Ddol

LL499EF

Eryri Terrace

LL499SN

High Street

LL519SJ

Dolbenmaen

LL499GA

Awel Y Grug

LL499UT

Morfa Bychan Road

LL554NW

Glaslyn

LL486LZ

Glaslyn

LL499JJ

Y Berllan

LL486BA

Bryniau Hendre

LL499TR

Sea View Terrace

LL499BE

Garth Terrace

LL499HA

High Street

LL499UA

Ralph Street

LL499TY

Church Road

LL499DS

Chapel Street

LL499RY

Bryncir Terrace

LL499AJ

Oakley Wharf

LL486DX

Glaslyn

LL499AP

Lombard Street

LL554YE

Glaslyn

LL486RS

Tynffrwd Terrace

LL554YQ

Glaslyn

LL499NZ

Penamser Industrial Estate

LL499SY

Tandderwen Terrace

LL499EP

Heol-Y-Wyddfa

LL499UB

Mersey Street

LL499HR

Maes Gerddi

LL499ND

South Snowdon Wharf

LL499SA

Glyn Terrace

LL486RW

Penrhyndeudraeth

LL519RJ

Dolbenmaen

LL486HR

Glaslyn

LL486RY

Isfryn

LL486NL

Pool Street

LL519HZ

Dolbenmaen

LL486RF

Penrhyndeudraeth

LL520RD

Lon Tabor

LL519AZ

Dolbenmaen

LL499UH

Tan Y Foel

LL499YQ

Chalet Park

LL499PB

The Crescent

LL499LW

Bank Place

LL499TN

Garth Road

LL486DW

High Street

Data Sources

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