The Borough Welsh Congregational Chapel (Welsh: Capel-y-Boro) is the mother chapel of the Welsh Congregational church in London, England. It is located at 90 Southwark Bridge Road in Southwark, a district also known as "The Borough". The roots of the congregation date back to 1774. There has been a Welsh chapel on the current site since 1806, although the present building dates from 1870.