Llanddowror is a village with a notable recorded history that can be traced back to the early/mid seventeenth century when Daniel Jones was noted as being appointed rector, and at a time when the Puritans were dominant and the Puritan Committee had taken control of the church of Llanddowror, along with others in Carmarthenshire.

 In the eighteenth century Griffith Jones was appointed rector in 1716, and it was in Llanddowror on 22 September, 1731 that he started the concept of circulating schools, which taught people to read in their native language – Welsh. By the time he died, it is estimated that over 200,000 people had learnt to read in schools organised by him. He is buried in Llanddowror Church.

Llanddowror was also on the main stage coach route from London to Tenby, and Picton House was an important and well used posting house. At one point there were eleven public houses in the village to cater for the servants to use, and Picton House also had a resident blacksmith with a forge for carriage repairs and showing the horses.

The Church is called St Teilo’s but is also dedicated to St Cringat.

In 2012 the long awaited bypass between St Clears and Red Roses was started, and it was opened in the spring of 2014. This takes the traffic away from the road between the two villages, which is relatively narrow for the amount of traffic that was using it – as a result this is now a much quieter road, safer to be used by cyclists and is part of the route for the annual  Carten event.

There is also evidence that the area was important many centuries before this in the form of  standing stones. There is an Early Christian sculptured stone at Llanddowror in the field adjacent to the church.  Described in the Royal Commission for Ancient & Historical Monuments in Wales's COFLEIN database as "two rough pillar stones, these monuments, both bearing crosses are thought to be of 7th-9th century date." The larger has the more visible cross.  There is also a standing stone just north of the bypass north of Llanddowror, which is noted on the RCAHMW site as being of unknown age - "An erect monolith 1.2m high, 0.4m wide at the base, tapering to 0.2m at the top, having no name and no apparent traditions." Access to it is by taking the track from the churchyard towards the bypass and then follow it underneath the bypass. The stone is visible through a gate in the field just beyond. The stone is very close to the former pilgrim route to St Davids.

Interestingly, Llanddowror apparently influenced the name of the hill station of Landour in the Lower Western Himalaya area of northern India. Landour was founded in 1827 during the British Raj era as a convalescent station for British soldiers serving in India. During British colonial rule, nostalgic British names were common in India and many of these names survive today although many others were discarded once India became an independent state

Both Llanddowror and Llanmiloe were within the Derllys Hundred of Carmarthen.