Cecil Chetwynd Kerr, Marchioness of Lothian (née Lady Cecil Chetwynd-Talbot; 17 April 1808 – 13 May 1877) was a British noblewoman and philanthropist who founded the Anglican Saint John's Church in Jedburgh and the Roman Catholic Saint David's Church in Dalkeith. A follower of the Oxford Movement, she eventually converted from Anglicanism to Roman Catholicism after she was widowed.