Kelso
small burgh (town) and agricultural market centre, Scottish Borders council area, historic county of Roxburghshire, southeastern Scotland. It lies on the River Tweed at the head of the Merse, a rich agricultural plain south of the Lammermuir Hills. The town has an important market and is noted for its yearly horse and ram sales.
Learn more about Kelso with a free trial on Britannica.com.