Tweeddale is a committee area and lieutenancy area in the Scottish Borders. With a population of 17,394 at the latest census in 2001 http://www.scotborders.gov.uk/outabout/aboutborders/census/7321.html Area committee population, Scottish Borders Council it is the second smallest of the 5 committee areas in the Borders. It is the traditional name for the area drained by the upper reaches of the River Tweed, this area was considered to end before the Yarrow Water flowed into the Tweed, so the area to the south and east, was bounded by the Yarrow/Tweed watershed, and to the north and east by the Gala/Tweed watershed.