Sir Charles Archibald Nicholson, 2nd Baronet (1867 – 1949), was an English architect and designer who specialised in ecclesiastical buildings. He carried out the refurbishments of several cathedrals (including the Cathedral Church of St Thomas of Canterbury, commonly known as Portsmouth Cathedral and the design and build of over a dozen new churches. One of the latter, but with the same name, is St Thomas of Canterbury's Church, Camelford, Cornwall.