SY23 postcode district: Aberystwyth and around
SY23 is a postcode district in Wales, with 985 postcodes in use in 6 sectors. It has postcodes in Aberystwyth and Llanbadarn Fawr. It is split between 2 councils: Ceredigion (984 postcodes) and Powys (1).
- Postcodes in use
- 985
- Sectors
- 6
- Councils
- 2 councils
- Places
- 2 places
Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources
Every postcode in SY23, and which are new since 2020
- New since 2020: 33
- In use before 2020: 952
- Outline: where 5 or more new postcodes since 2020 lie together
Of the 985 postcodes in SY23 that ONS places, 33 are new since 2020 and 952 were in use before 2020.
Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. New since 2020 means it came into use in January 2020 or later. A dashed outline shows where 5 or more lie within 210 metres of each other. It is not a boundary, and no boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.
The middle of its postcodes: latitude 52.3792, longitude -4.0520. Open this area on OpenStreetMap
Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; when each came into use: the same directory; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them
The 5 newest postcodes
Where the new postcodes lie together
- 10 new postcodes since 2020, outlined on the map. SY23 9DQ, is the newest of them.
What broadband can you get in SY23?
Ofcom reports on 956 of the 985 postcodes in SY23. At 491 of them every home and business can get gigabit broadband, and at 73 some cannot get decent broadband (10 Mbit/s).
Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.
Check one address on Ofcom's checkerSource: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it
What do homes sell for in SY23?
Homes in SY23 sold for a typical £235,000 in the 12 months to August 2026, across 239 sales, up 5.4% on the 12 months before, HM Land Registry's figures show.
- Detached £309,950 97 sales
- Semi-detached £217,500 62 sales
- Terraced £188,500 54 sales
- Flat or maisonette £172,000 26 sales
Each bar is that kind's typical price, against the most expensive kind here.
Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.
Source: HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. How we use it
Postcodes in SY23
Pick a sector, then a postcode. A sector is the district plus the next digit.
Places in SY23
Towns and villages with postcodes in SY23, and how many each has here.
Who covers SY23
How many of the district's postcodes in use fall under each council, constituency and police force area.
Councils
- Ceredigion984
- Powys1
Constituencies
- Ceredigion Preseli984
- Brecon, Radnor and Cwm Tawe1
Police force areas
- Dyfed-Powys985
Next to SY23
"Next to" is by number: the districts before and after SY23 in the SY area.
Check a postcode
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