Main Page | See live article | Alphabetical index Carmarthen (Welsh : Caerfyrddin) is the county town of Carmarthenshire, Wales. It is on the River Tywl and has a population of about 20,000. It is the site of Trinity College Camarthen. This article is a stub. You can help Wikipedia by fixing it. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.