or RICKMELSWORTH, a market-town of England, in the county of Hertford, on the Colne, 18 miles N.W. of London, and 23 S.W. of Hertford. It is a straggling place, and has a parish church recently rebuilt, but retaining the embattled tower of the older edifice. The Wesleyans and Baptists have also churches in the town. National and British schools afford means of education; and there are also Sunday-schools, almshouses, &c. Straw-plaiting and weaving of horse-hair fabrics are carried on; and in the vicinity there are flour, paper, cotton, and silk mills, mostly moved by water-power. Here too is a large brewery. Markets are held weekly, and fairs thrice a year. The Grand Junction Canal passes near the town. Pop. of the parish (1851) 4851.