| Postcode | SA31 1PR | 
|---|---|
| Post Town | Carmarthen | 
| Nearest station | Carmarthen (0 km) | 
| Bus stops | Bus Station () Peacocks (W) Market Way (SE) Tanners` Arms (E) Railway Station (NE) Council Offices (SW) | 
| Roads in this postcode | |
| Number of UPRNs | 20 View | 
| Known addresses | Magistrates' Court, Guildhall Square, Carmarthen 15 Guildhall Square, Carmarthen 16A Guildhall Square, Carmarthen 17 Guildhall Square, Carmarthen | 
| Main property type | Other | 
| Businesses | 
                        No businesses found
                     | 
| Latitude | 51.856168 | |
|---|---|---|
| Longitude | -4.307667 | |
| Easting | 241172 | |
| Northing | 220027 | |
| Grid reference | SN411200 | |
| UTM reference | 30U 409942 5745849 | |
| what3words | area.head.skips | |
| FixPhrase | crisped luminous spinster trapping | |
| Plus code | 9C3QVM4R+FW | |
| Altitude | 20 metres (64 feet) | |
| Sunrise (today) | 7:11 | |
| Sunset (today) | 16:53 | |
| Distance away | ||
| Distance to sea | 4.5 KMs (2.8 miles) | 
| Parish | Carmarthen | W04000494 | 
|---|---|---|
| Ward | Carmarthen Town North and South | W05001183 | 
| Unitary Authority | Carmarthenshire | W06000010 | 
| County | Dyfed | W11000002 | 
| Constituency (2024) | Caerfyrddin | W07000087 | 
| MP | Ms Ann Davies | Plaid Cymru | 
| Police force | Dyfed-Powys | |
| Water company | Dwr Cymru Welsh Water | |
| NUTS/ITL 3 | South West Wales | |
| NUTS/ITL 2 | Mid and South West 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 | 
| Index of Multiple Deprivation (2019) | Most deprivedLeast deprived | |
|---|---|---|
| Average household income (2020) | Lowest (£22,200)
                        Highest (£108,100)
                       | |
| Rural/urban (2021) | Urban: Further from a major town or city | |
| Rural/urban (2011) | Urban city and town in a sparse setting | |
| Built up area (2024) | Carmarthen | W45000937 | 
| Census output area (2021) | W00003450 | |
| Census output area (2011) | 7D3 | |
| Lower layer super output area (2021) | Carmarthenshire 008A | W01000641 | 
| Lower layer super output area (2011) | Carmarthenshire 008A | W01000641 | 
| Middle layer super output area (2021) | Carmarthen South & Llangynnwr | W02000149 | 
| Middle layer super output area (2011) | Carmarthen South & Llangynnwr | W02000149 | 
| Travel to work area | Llanelli | W22000028 | 
| Average property price in Swansea | £199,131 | 
|---|---|
| Annual change | 2.4% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| Magistrates' Court, Guildhall Square, Carmarthen | Other (leasehold) | Nov 2019 | £728,212 | 
| Other (freehold) | Nov 2016 | £223,000 | |
| 17 Guildhall Square, Carmarthen | Other (freehold) | Dec 2018 | £90,000 | 
| 16A Guildhall Square, Carmarthen | Detached (freehold) | Apr 1999 | £80,000 | 
| 15 Guildhall Square, Carmarthen | Semi-detached (freehold) | Jun 1996 | £300,000 |