| Postcode | CF45 4RW | 
|---|---|
| Post Town | Mountain Ash | 
| Nearest station | Abercynon (0 km) | 
| Bus stops | Station Road (SW) Post Office (S) Post Office (N) Clock (SE) Ynysmeurig (SW) Ynysmeurig (NE) | 
| Roads in this postcode | |
| Number of UPRNs | 36 View | 
| Known addresses | 1 William Street, Abercynon 4 William Street, Abercynon 5 William Street, Abercynon 7 William Street, Abercynon 8 William Street, Abercynon 9 William Street, Abercynon 10 William Street, Abercynon 12 William Street, Abercynon 14 William Street, Abercynon 16 William Street, Abercynon 19 William Street, Abercynon 20 William Street, Abercynon 21 William Street, Abercynon 22 William Street, Abercynon 23 William Street, Abercynon 24 William Street, Abercynon 25 William Street, Abercynon 27 William Street, Abercynon 29 William Street, Abercynon 30 William Street, Abercynon 31 William Street, Abercynon | 
| Main property type | Terraced | 
| Businesses | 
                        No businesses found
                     | 
| Latitude | 51.644044 | |
|---|---|---|
| Longitude | -3.329568 | |
| Easting | 308098 | |
| Northing | 194754 | |
| Grid reference | ST080947 | |
| UTM reference | 30U 477195 5721500 | |
| what3words | candy.feelers.sunbeam | |
| FixPhrase | crinkle lung slot swipe | |
| Plus code | 9C3RJMVC+J5 | |
| Altitude | 83 metres (272 feet) | |
| Sunrise (today) | 7:04 | |
| Sunset (today) | 16:51 | |
| Distance away | ||
| Distance to sea | 22.4 KMs (13.9 miles) | 
| Parish | Abercynon | W04000678 | 
|---|---|---|
| Ward | Abercynon | W05001072 | 
| Unitary Authority | Rhondda Cynon Taf | W06000016 | 
| County | Mid Glamorgan | W11000005 | 
| Constituency (2024) | Pontypridd | W07000106 | 
| MP | Alex Davies-Jones | Labour | 
| Police force | South Wales | |
| Water company | Dwr Cymru Welsh Water | |
| NUTS/ITL 3 | Central Valleys and Bridgend | |
| NUTS/ITL 2 | South East Wales | |
| NUTS/ITL 1 | Wales | |
| Country | Wales | W92000004 | 
| Date introduced | January 1980 | 
|---|---|
| Last updated | September 2025 | 
| User type | Small (addresses receive less than 25 items of mail per day) | 
| Quality | Within the building of the matched address closest to the postcode mean | 
| Population (2011) | 77 | |
|---|---|---|
| Households (2011) | 33 | |
| Index of Multiple Deprivation (2019) | Most deprivedLeast deprived | |
| Average household income (2020) | Lowest (£22,200)
                        Highest (£108,100)
                       | |
| Rural/urban (2021) | Urban: Nearer to a major town or city | |
| Rural/urban (2011) | Rural town and fringe | |
| Built up area (2024) | Abercynon | W45001111 | 
| Census output area (2021) | W00006035 | |
| Census output area (2011) | 6B2 | |
| Lower layer super output area (2021) | Rhondda Cynon Taf 012A | W01001143 | 
| Lower layer super output area (2011) | Rhondda Cynon Taf 012A | W01001143 | 
| Middle layer super output area (2021) | Abercynon | W02000263 | 
| Middle layer super output area (2011) | Abercynon | W02000263 | 
| Travel to work area | Merthyr Tydfil | W22000029 | 
| Average property price in Cardiff | £221,509 | 
|---|---|
| Annual change | 2.2% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| 23 William Street, Abercynon | Terraced (freehold) | May 2025 | £155,000 | 
| Terraced (freehold) | Feb 2017 | £77,000 | |
| 20 William Street, Abercynon | Terraced (freehold) | Sep 2024 | £98,000 | 
| 29 William Street, Abercynon | Terraced (freehold) | Sep 2024 | £167,000 | 
| Terraced (freehold) | Jun 2021 | £136,500 | |
| Terraced (freehold) | Mar 2020 | £120,000 | |
| Terraced (freehold) | Dec 2011 | £92,650 | |
| 10 William Street, Abercynon | Terraced (freehold) | Apr 2023 | £159,995 | 
| 8 William Street, Abercynon | Terraced (freehold) | Dec 2022 | £103,618 | 
| 19 William Street, Abercynon | Terraced (freehold) | Nov 2022 | £144,950 | 
| 24 William Street, Abercynon | Terraced (freehold) | Sep 2021 | £130,000 | 
| Terraced (freehold) | May 2019 | £59,501 | |
| 27 William Street, Abercynon | Terraced (freehold) | Oct 2020 | £72,500 | 
| 16 William Street, Abercynon | Terraced (freehold) | May 2019 | £105,000 | 
| 5 William Street, Abercynon | Terraced (freehold) | Oct 2018 | £128,500 | 
| Terraced (freehold) | Aug 2017 | £52,000 |